Yes, but your audio will sound shit compared to listening to lossless audio with wired headphones. Oh, you also probably don't own that music also, once those servers go down you'll lose everything.
Yeah those are good points, sure. I shouldn't wear headphones while driving, and the door speakers are basic anyway, so I don't see that a priority right now, but have considered that before.
TBH, the only music I do listen to via steaming service is the stuff I haven't bought physical copies of yet, and copied over.