Honestly every car app I've used is just terrible. VLC locks out half your artists (it does unlock when you're stopped). Maps blocks limits the keyboard and forces you to use voice.

I'm frequently disconnecting my phone, doing what I want, and then reconnecting it. This defeats the entire purpose of car play other than that my GPS is displayed in a place that is visible to me. I'm sure the play engineers have thought long and hard about how to prevent certain behaviors. But I am not confident they watched people use them in the real world. People are very good at finding ways around limitations. It's impossible to think your way through this without actually observing people. I'm not so sure it is Skinner and lab rats but "we're smart and thought about everything." I'm sure you're smart, but no one can think of everything. Thinking that makes you not smart.

Worse, there's no passenger mode for these apps and most of them don't lift restrictions when you're stopped. The lack of these features adds to people not stopping and just doing more dangerous things.