As a user I don't care. I would rather have a transportation option than not. What do you expect millions of people to do? Either don't travel or go back to driving their own cars? What is this abstract "social good" where nobody is served and everyone is miserable?

Lack of alternatives is the problem. Externalities of Uber are nothing but political outrage and a distraction. If the govt put even a fraction of the effort in battling Uber into building more rail and bus lines then everything would be solved.

This has been proven by the massive surge in electric scooters and bike sharing companies, which Uber also provides. Are those externalities too? Or do people just want to get around and need ways to do so?