Much of our traditional use of ownership and of setting aside resources, is based on the underlying fear that there isn't enough to go around. If I indebt myself for a year's worth of work, somebody will give me a car that I can put my name on, and then, if I always lock it, and it doesn't get stolen anyway, or totaled, then I hope that I will always have transportation. Personally I would be just a happy renting a car. Or even better, if a car or other comfortable transportation always was cheaply available when I needed it. There are other issues in the big picture, of course.
Cars burn up gasoline, make pollution, take lots of resources to build, and so forth.
But that is also more reasons to have fewer of them, utilized more economically. The big idea here is not that somebody could cram people closer together and make bigger profits. Rather, the idea is to have and use the resources where it makes the most sense, and since that also saves a lot of resources, they can then be used for more creative and enjoyable purposes. I'd rather work where I live and sleep than anywhere else. I could care less if somebody isn't setting aside an office for me in downtown.