At least in SF, last I checked, it's as expensive, or sometimes more expensive, as Uber/Lyft. It'll serve the same sector of the population as those apps already do, so it's unlikely to actually reduce parking needs.

There's an argument that more competition could reduce prices and/or wait times for consumers, but there's also the argument it'll take away gig jobs, which are already somewhat of a "backup net" for people who need money but can't find a formal job for some other reason.

I don't live in SF anymore. When I did and now that I occasionally visit, I personally don't see any meaningful difference from when only Lyft and Uber operated there.