Those are hardly the only reasons. I want a vehicle that has my stuff in it: My kids' car seats, my cell phone charger, my wife's umbrella, our radio presets, etc. If a random car pulls up at my house and I have to put 3 armloads of stuff in it every time I get in, that's a big deal. I frequently put stuff in my car for a second destination; sports equipment, a change of clothes, re-usable shopping bags, library books, etc. That's impossible if I'm in someone else's car. I want a vehicle that's comfortable and that I'm familiar with; I sit in it for 2 hours a day, and I don't want to worry if I'm going to end up with gum on my pants from the previous occupants.

My car isn't just a train or a bus that goes directly to where I want it to; that's called a taxi. My car is a small extension of my house.

I recently consumed a piece that argued that auto manufacturers have been supremely successful in linking our personal cars to our egos. "You are what you drive." It really hit home for me and appealed to the part of me that finds little appealing in attachment to physical things.

However I will say that your issues are pretty easily solved, imo. The car service simply customizes your ride experience with your radio choices. Car seats are necessary because of imperfect human drivers and (?) not necessary when robots are driving.

Removable/secure trunks could be stored at some site until needed, retrieved from cars and stored by robots since lifting and carrying are simple tasks for robots. When you request the next leg of your service, the first stop is the storage center where your secure trunk was stored.

I already mentioned about the maintenance facilities Musk is working on. Cheap and effective sensors detect gum/soilage, modern fabrics repel dirt and detritus and are cleaned to tolerable levels. Or another car comes instead. And your 2 hours in a car drops precipitously as smart-queuing greatly improves travel times.