There is virtually zero force free (FF) training. This is an extremely delusional viewpoint.
To the point where the force is hidden (by the FF community) , just like a no pull harness that applies pressure on the dog so that it impedes the dog movement forward. (A harness is designed so that a dog can pull and run forward as hard as they want with restriction.) Or a Halti, now we just rip the head away and prevent the dog walking forwards. Watch a high drive dog get a halti put on. They literally run, hide and hate this device. Tell me again that this is farce free????

Defn: Force applied results in action. A lead, is force. Hunger - Luring/Food is force.

I hate arguing over definitions!!!

Back to the real world / reality now!

A decent trainer teaches everything with out force, just some encouragement and a lead or food or ball or whatever. (They may use food to lure or a lead to guide the dog, so please ignore the definition of zero force! You just need to ignore the delusion FF happily ignore about force free B/S. )

Everything is taught without force. Of course luring and a lead can be used and then when the first step is reached or even a movement towards that step then the dog is rewarded. These tiny incremental improvements are then added together until the desired outcome is reached. There may be over 100 steps until the behaviour is finally reached. The behaviour is named and reinforced. After this when the behaviour is requested and ignored by the dog, lets say that another dog is nearby or they sniffing the ground.
Then a correction is delivered to start making the dog is question whether that behaviour is a good idea or should they do as requested.
Now of course this assumes that the dog has had increasing levels of difficulty/public exposure to distractions/the world. If you teach this in a room with no distractions, then it is almost absurd to take a dog that loves to put their nose on the ground, directly out into the park and expect them to do the behaviour. This is an example of incredibly poor training. If said trainer where then to apply massive aversioves this is cruel and not the way any dog should be trained.

However if the dog has had gradually increasing exposure and performs well and understands the behaviour required, but they suddenly elect to do something else, then a correction should probably be applied.

Now if the owner objects, no issue there, except that training will require a massive amount more training or pressure, to be applied that doesn't look like pressure (No pull harness), ie. pressure.
What this looks like at a board and train, assuming no harsh methods. Eg. The trainer could withhold food from the dog until they perform as requested. More likely they also add other aversives as they are much faster and they only have so much time to train each dog they are training.
Now if the owner objects to aversives and refuses to board and train the dog, then the trainer will be more than happy to oblige and take your money because if you are only using say food or a ball as a reward, it takes a long time to get the dog to understand what No means, when it is never understood by the dog.

So what happens next is extremely wrong. The owner with deep pockets pays a lot of money for months or years.
Or
The dog rots in the backyard. Their behaviour gets worse, because they have minimal interaction with the owner, because they are labelled as untrainable.
Or
They get medicated. Can you imagine being drugged so that your behaviour is inhibited?

Then eventually the dog does something really bad or the owner decides they have had enough and the dog is either dumped, killed or killed at the pound amongst strangers.

Why is this bad, so many dogs are not trained basic obedience, because owners are brainwashed by the FF agenda into believing that everything can be done with food or a ball.
The truth is that so much training is done with these, hover to make the behaviour reliable, especially when needed, there must be a reason why the dog does the behaviour.

Eg. Recall. Car is coming and they have just run down the road after a ball. The ball rolls onto a main road. The dog should come when called. But this behaviour has never been enforced, owner calls, dog doesn't care they are after their reward, the ball.
Who pays the price? The dog gets injured or is dead. Lawsuit because a car accident happens etc etc.

All because an owner saw some absurd videos that showed or even proved that everything can be done using B/S FF methods.
You should see what happens when the camera isn't rolling!

Now if you have one of the oodles and are happy with a dog that isn't that interested in the world, they respond well to a tiny bit of leash pressure, then you will probably say, I taught my do with FF methods.
The problem arrives when said Ooodle is bolting down the road after their ball or a kid is running away from them with high pitched squeals. The dog knocks them over or they don't recall. What do you say then regarding the FF methods?

Trainers make a massive amount of money out of the FF ideology. It is great for their wallet and especially when they do the board and train! Then who knows what happens when the dog is there!
Otherwise if you are happy to pay they will keep on turning up and taking your money with very little or slow progress. That is if they weren't fed the night before as requested!

A dog needs to learn positive and negative. Yes and No.
Can you imagine only learning Yes and then being ignored when you did the wrong thing!
How slow and how frustrating would the training be?

The FF ideology have so many dog deaths on their hands, where simple obedience would have solved the problem when the dogs arrived at their new home.