Like Uber replaced all drivers with self driving cars [1] in its 20 years of operation? Just because I want to paint the moon pink, doesn't mean it's feasible.

[1] If anything, Waymo has a higher chance and global Waymo adoption is probably 20 years into the future, at least.

Like Uber replaced all drivers with self driving cars [1] in its 20 years of operation?

They're trying. I see Uber robotaxis almost daily.†

I haven't bothered to see if they're still in training or actually taking passengers.

† https://lucidmotors.com/stories/lucid-nuro-uber-partner