Again, you don't appear to understand the scale, nor the demographics. True, I am sure there is more civil aviation infrastructure in the US than Europe, and probably more private aircraft ownership as well. But vast swathes of the populace can't afford private plane ownership, nor the cost of a rental car once they get to their destination, needed because of lack of mass transit. Imagine that.
Also, we don't have the passenger rail capacity nor culture to use it that Europe has. Our long-distance passenger rail service, while exclusively Federally-owned, is prohibitively expensive. It is very common for train tickets to be more expensive than airfare. The poor either drive their own cars, or less often, take a long-distance bus, if one is available for their destination. Again, once you get to where you are going, there more often than not isn't public transit, so car rental.
Lastly, there actually are Americans that enjoy driving. Cars are very much more a part of our culture than any other. Insane? Perhaps. Certainly a citizenry that allowed Trump to be elected a second time has a screw or two loose.