Back in Europe at least, I know several of people who use taxis for all their getting around -- with the occasional subway ride thrown in.
And those are people that get around a lot, though that's mostly true for above a certain income source and usually on creative professions (directors, composers, journalists, etc. -- kind of like people whose work doesn't necessitate commuting every day to some office, and who couldn't afford a 24/7 personal chauffeur, but could still pay for 2-5 taxi rides per day).
That said, this post was intended to encourage people to think about the future of transportation, not saying that everyone should immediately switch to Lyft/Uber.
Car/bike ownership will certainly make sense for some people for quite some time, even after we have fully autonomous vehicles. But I maintain that cycling is more recreation than an effective method of everyday transportation, and it is frustrating to see the biking contingent pushing it as a transportation option to encourage public expenditure on their recreational needs.
Really, I think the minimum knowledge needed to use a bike for transportation is quite small. Walk into a local bike shop, list your needs/abilities, pay money, and start riding a bike. When you stop, use the u-lock they gave you to lock up the frame. Every week, put some air in the tire and recharge your lights. If something breaks, take it back to the shop.