Sounds kinda dangerous if there is an unexpected hill but should be fine

Yes it does.

Yeah that is BS comparing it to a house HVAC. A house HVAC runs at 100% until the temp is reached. A car will for some dumb reason run softly if I set it to 75 and it’s 90 in my car. I max it out hot or cold until I am comfortable and then set the auto.

They have to live outside, in 140 degree heat, in -40 degree cold, in the sun, and last 20 years. Try that with your smartphone.