I very literally did not make that assumption. I pointed out, in a sentence you quoted yourself, that public transit can drastically reduce the amount of point-to-point personal transportation an individual wants or needs. However, sometimes, you really can't beat the convenience of "I am at point A, I want to be at point B, and I don't want to deal with a series of stops and transfers to get there". Maybe your starting or ending point is an unusual location. Maybe it's an unusual time of day. Maybe you're wearing a tuxedo or a cast and don't want to do the amount of walking public transit normally requires.

In any case, point-to-point transit is sometimes worth the expense. And when it is, self-driving taxis are fantastic. Compared to driving myself, I don't have to commit at least 75% of my attention to not killing myself or others. I can just read a book, or watch a movie, or do the morning crossword. Compared to taxis or Uber, I don't need to deal with a driver.