- My phone's screen is nowhere near big enough for me to "glance" at it while driving (to see if my turn is coming up, etc)
- I'm not carrying around a tablet with me - my phone fits in my pocket
- Mounting is _not_ a solved problem. It just... isn't. This is a whole topic on it's own, but mounting a phone in a good position, where it will stay without moving/falling/bugging (especially in 100+ degree heat) and not be in the way of _other_ car things is a pain
- I already have physical buttons (that interact with car play, where needed) for all those things in my car
- Interacting with the screen of my phone while driving is 100% not something I'm proficient with; nor would I want to be. It's not designed for interacting with it while not paying attention to it. CarPlay is
That's not Android Auto, it's Waze doing that (and it would do it on Apple too). And it's not "an attempt at engagement", it's a cost for keeping the real-time map and traffic data that Waze is chosen for up-to-date. Use Google Maps if you don't like the interruptions.