I especially think the "your car becomes a taxi and pays for itself" gimmick is beyond fantasy. I chalk it up to Musk being an actually mildly insane CEO, which has benefits to go with its downsides.
As for the cost of the car, I wanted an EV with more range than other manufacturers provided. (I also make use of the longer range on a regular basis--probably about 2 times a month?) (edit:) I also wanted a car that Went Fast. Not practical in any real sense, but a lot of fun.
There are around a dozen Tesla owners at my company. As far as I know, none of them are banking on their cars being a taxi and earning tons of dough. At least one has the FSD upgrade, and uses it primarily to back his car out of the garage on its own so his kids don't bang up the doors when they get in.