Yeah, but imagine you live in Phoenix, AZ, and you can't/won't drive for whatever reason, you've got to get to work every day. Phoenix has buses, but they're not going to be convenient for lots of possible daily commutes. Daily taxi/Uber/Waymo rides are probably a pretty good choice.

Or imagine that you work a professional travel job and you're flying to/from the airport on a weekly basis. Your employer will pay for your ride to the airport, so why would you take public transit? Now you're doing at least 3-4 taxi/uber/waymo rides a week.