No, really, think about it. A touch screen is literally one component plus a computer you need anyways. Buttons need scaffolding, they need to be wired, etc. If you are designing a new car today, figuring out where all those buttons go for each model is a chore, it makes production more complicated, it requires more logistics vs just a touch screen.
Flush handles have to do with creating a recess in the body for normal handles. It’s just easier to cut a hole.
I’m guessing you aren’t willing to consider that the car companies are just being thrifty rather than extravagant, but ya, it’s a win win for them if they can save on costs at the same time as being seen as fancy.