Most times I take a lyft/uber I have something else to do in the car ride + rarely want to talk to the driver. Maybe that's rude, but if I take a taxi or a bus, I just want to get somewhere, not have a conversation.
With the advent of "tips" and "compliments" - I've noticed how much more drivers talk to you just because they think it will help with tips, when really - I'll tip them more if they get me there faster w/ less hassle.
Maybe this makes me a bit cold, but I feel like it could be a trivial thing to fix considering each rider has their own preferences. Seems like you could set a default on your profile "I like chats", "just business" etc - and let your driver know ahead of time and avoid the "I don't really want to talk right now" type of chats that have no way to not come out rude.