I found that I was using the wheel warmer button way more than I through I would. It's located right in middle of a cluster on the central console, in an awkward place to look at (right next to my hips in a blind spot).
I devised a nice and cheap fix for this UI problem that wouldn't be applicable on a touch screen: I put a googly eye sticker on it.
Better tactile feedback, no loss of function, and more whimsy in my otherwise boring car.
It illustrates the point that accessibility isn't only for disabled people. It benefits everyone, and if you're lucky to live long enough, you'll need it even more every day.
I suppose we're all just pre-dead as well?
What a depressing way to look at life.
You may want to seek out help from a counselor.
Not everyone is predisabled: many unfortunate people won't live long enough to suffer the consequences of old age. But I'd rather not die before I get old, myself. I certainly hope I'm predisabled instead of short lived, myself.
It sounds like you're the one who needs a counselor if you're so depressed and having such a hard time facing the fact that you're getting older every second, until you die.
If you're designing user interfaces, you might want to seek out help for an accessibility specialist.
I suggest we call the people on the other side of this divide "Daltreys" and prohibit them from designing any UIs.
For things that you do regularly the button should be optimized to not be in the middle of a cluster. Ideally it'll be somewhere you can see easily (like on the steering wheel), and most importantly of all it isn't dependent on context. In my car I can easily turn on the aircon, or change the music volume, or answer the phone without looking away from the road because I know where the button is and one press always does that thing. On a touchscreen you always need to give it attention because the screen area changes what it does depending on what you've pressed before pressing that area. That is a huge disadvantage.
Your point about pressing a button not doing what it's supposed to is right, but I have to admit I can't remember the last time that happened in any car I've owned. Buttons not working isn't a common issue as far as I know.