This is what people don't seem to get...with a set of physical buttons, you can find what you're looking for just by feel, glance down briefly when it's safe to do so to make sure it's the button you want, then press it.

With a touchscreen, in contrast, you have to hover over approximately the location you think you want to press, and either hope you don't hit a bump before you have a chance to look down and make sure it's the right spot or look down immediately.

I put a touchscreen head unit in my car in 2016. If I drove more often I'd dump the touchscreen in a heartbeat.