Because of the lack of tactile feedback, touchscreens often lead to distracted driving by forcing drivers to take their eyes off of the road to carry out simple tasks. As an example, take HVAC and radio functionality -- in older cars with buttons and knobs, after a short amount of time, people can operate these functions without looking. The same is not true for touchscreens. That's not to say that there is no place for them in cars, but the consensus it's better to use a combination of touch screen (for things you don't often adjust while driving) and physical controls (for things you do). But it's generally cheaper to slap a big ol' touchscreen in cars that does everything, and change configurations in software, rather than investing in custom interior designs for each model of car. And it's not just Tesla doing this, even companies who hang their hat on safety like Subarus are stuffing more and more functionality into touchscreens[0].
[0] https://www.motortrend.com/cars/subaru/outback/2020/2020-sub...