Because infotainment systems are designed and implemented In a fashion our overlords deem safe

and they are... for the overwhelming majority of people. no function can take more than 2 seconds to perform, and require more than a glance... way less than a phone requires for just about anything... simple.
It's funny though.. the older generations wheeze on about how "bah.. I can't figure out how to do anything with this confounded piece of technology!... I swear I'm gonna have an accident just trying to change the radio station!"
Backwards it's just about the same thing..
Put a freshly licensed teen in a vehicle made before the early 90s, send them on their way, and then tell them to find AND make a pre-set for their favorite station on the vehicles
analog radio... kids definitely gonna wind up in the ditch