I can control Waze and Apple Music/Podcasts from my steering wheel, or the rotary knob. Or the touchpad if I was a weirdo. It's amazing.
Yes, you could achieve the same for music/podcasts via bluetooth, but you couldn't switch between which app is playing, and you didn't get Waze/Maps/Whatever GPS app you prefer, they're all better than the built in shit on most cars.
I suppose you could also get by with a paper map for your road trips and stuff, but personally I'm too lazy for that. It's fun, don't get me wrong, but I don't want to stop my car to figure out where I'm going.