You could, but you shouldn't.
Private vehicles are convenient but they're quite possibly a social ill. Roads are wasteful of space. Car parks are wasteful of space. Garages are wasteful of space. The infrastructure itself, even if you don't care about the opportunity cost of the space (you should), is harmful to the environment and the way we've collectively shaped spaces around cars has been bad for our health and, unsurprisingly, isn't really the most efficient way of laying things out (nor that aesthetically appealing either). And that's before we talk about the pollution caused by driving itself. Trucks are also bad. Driving is, really, rather irresponsible. Certainly, if you don't need to.
Fewer people driving would, theoretically, open the electorate up to policy measures that address this. No more subsidised parking in cities. No more willy-nilly road building schemes designed to win votes. Tougher environmental regulations. No more minimum parking requirements. This is especially likely in places where some of these things are already happening/in the works.
In many parts of the world, then, the adult thing is not driving. In the sense that being an adult is being less "I'm a special snowflake," which is actually what underlies anything sold on the basis of convenience (i.e. the world should accommodate you). But, obviously, if you live somewhere like, say, Ramarama not being able to drive is fairly problematic. I'm pretty sure there aren't any busses that run through it, not that there's a clear it (there's a school but this is a rural community not far from obvious other places to shop). If, of course, one doesn't want to go anywhere, this is not so much of a problem, though.
We can separate out the issue of "has a licence" and "doesn't have a licence" but because those tend to have expiry dates, it's possible the above argument can sometimes manifest as, "if you're not going to drive, don't get a licence". But, again, you see it is kind of stupid to use this as a measure of adulthood on account of how microscopic the logic is.
Some of the other things listed by the OP possibly also fall into the "doing less is meant to be a bad thing why?" category, as others have noted.