Didn't Uber start branded as a "ride sharing" app where the app helped you find someone to car pool into work with?

I suspect an underlying issue with socialising is faith in humanity. It's hard to have faith in humanity in the modern world when every front appears to be telling you otherwise. If you don't have faith in humanity, then you're limited to only interacting with those: "you have to" and "are vetted".

They could in theory yeah. I’m not sure if Uber still offers it, but I think its uptake is so low (anecdotally from people I know) that it’s effectively not a solution to societal isolation, because it doesn’t end up being used.