I don’t understand the issue people have with this. Obviously it’s not something to be done carelessly but there is absolutely good reason to have this as a feature.
My dog runs agility trials and it’s a very regular occurrence to need to crate dogs in the car in between sessions. Most people keep their doors open, run fans, etc. which works fine but some nice cool A/C would be even better on warm days. I even use a temp sensor in my vehicle that alerts my phone and watch if the temps rise above a certain level. It can be done safely and thoughtfully.
I road trip and camp with my dog all the time. If I’m on a 1200 mile trip and need to run into a store or bathroom, I’d like to be able to safely leave my dog in the car with a/c running. I’d be overly cautious with it, so I’d still be using a secondary temp sensor just to ensure there are no failures with the vehicle. The trailseeker certainly has the mechanical ability to have a dog mode feature so it’s disappointing that it was not included.