The sad but real reason a ton of this is happening is one very big word that is typically not present in things like car / airplane design: flexibility... flexibility to change the user controls, flexibility to fix problems, flexibility to let the SW team work up until the last minute to get stuff working, and the second part that goes with this is cost. Touchscreens mean increased flexibility for the design and better control over cost to deliver features. Unfortunately, if the display dies and you can't see anything, then the car or plane may crash... so sadly it will probably take a couple of those events happening for this to be changed to have some kind of redundant systems that the pilot can use when the display dies suddenly.