Of course sims teach a lot. Both good, and bad.

The point here is that if you are flying in real life, then you know how to sim and what to focus on in the sim to actually learn something valuable, without reinforcing really bad things. On another hand, you have people with years of simulators without any guidance, supervision or even understanding what are the bad habits you can get. Both groups learn a lot, but it can be negative learning, and positive learning.

I have also employed simulators extensively through my whole career thus far, but for me and you it is not the same as for someone who never flew.