Once FSD is ready I won't need to own a car anymore. I'll simply hail a FSD Tesla Uber for whatever errand I need.
You can do that now, the only difference being the car has a driver. Why will the absence of a driver make the difference between owning or not owning your own car? Do you assume that FSD Uber Teslas will be so plentiful that it eliminates the sometimes long waits? That, IMO, in an unwarranted assumption. My FSD Tesla will not be on the network because I don't want strangers in my car when I'm not. Do you assume the rides will be cheaper without a driver? I highly doubt that. Ride sharing is a great model, but eliminating the driver is not going to change the overall availability or economics.
... Money tends to be a distraction from the fun we could be having in life.
The fun things I do cost money. Money cannot buy happiness, but money can pay for a lot of really fun activities. And the lack of money can certainly "buy" unhappiness. As when your kids go to bed hungry because you don't have enough money to buy food. There's probably a point of diminishing returns in the unhappiness:money:happiness equation. Having as much money as Bill Gates probably wouldn't make me any happier than I am now, but if I couldn't afford my hiking and kayaking trips I would be less happy than I am, and if I could not afford a place to live I'd be very unhappy.