But, you used to be able to order all sorts of stuff - or not order it. For example, you could save a few hundred bucks by not having a rear bumper, not having a radio, opting for manual windows and transmission, opting for no cruise control, etc...
There were a multitude of options and you could add/delete most anything you wanted.
These days, it's down to packages and colors. Often, you can't even mix packages and trying to get manually controlled windows will usually get you laughed at.
Is the stereo just an AM/FM radio? Does it have a CD player? A CD changer (how many people even buy CDs anymore)? Does it get satellite radio? Does it have AUX input? Does it have Bluetooth? Is there an interface to communicate to the the Bluetooth device (people driving around controlling their stereo from their phone is more dangerous than people doing the same on their car's touchscreen)? Can it stream music without a Bluetooth connection? Does it have Spotify? What about Apple Music? Does it offer handsfree control? And so on.
There simply isn't a universal definition of what a "dumb car" would be and not everyone is going to desire the same set of features.
Personally, I really enjoy that with our new van I can listen to a podcast/music through Bluetooth and pause/resume playback through a simple touchscreen without having to fiddle with my phone directly.
I'm not sure what your point is. I never said that no one wants these features. Obviously there are many that do.
I think an extremely small minority of people who want a "dumb" car don't want those features. I feel like you're just making up a strawman here. It's pretty clear (at least to me), that the people who want a dumb car are talking about things integrating with your phone or being displayed on a touch screen. I think anything that existed 20 years ago is not regarded as dumb by basically anybody.