While I agree this makes it easier to own and fly. The problem then comes down to who gets to fly it and when. If I'm tight for cash, I'm probably a working Joe. This means weekends only. Then I have 3 other guys to schedule around (not to mention other family things on weekends). Owning my own motorcycle is far more attainable and usable. Yes I need a special license, so what. With a plane I need to BFR every couple of years plus medicals. Yes these cost are actually not that much but everything adds up. Plus aircraft also required thing that many other hobbies do not. Again expenses. Seriously, add up a weekend going off-roading vs flying off for the $100 burger.
That all said - if there's a will, there's a way