Except in areas where that isn't really an option. I used to live in a rural area where it was almost 100 miles to the nearest commercial airport, and the smaller city where the airport was located didn't have anywhere you could store cars in that manner.* If you needed to travel by air for a very long trip your alternatives were (a) find a good friend or relative to pay to drive you to and from the airport or (b) pay the airport parking fees. IME most people used the (a) but not everyone could. (Greyhound used to stop in the rural town many years ago but no longer did so.)

There are similar areas of the country where you face quite a haul to the nearest commercial airport and even that isn't necessarily in a city with a lot of options.

* There are of course storage facilities in that city, usually locker type places with a bit of space for cars, RVs, etc. as well. But my parents live there now and based on my father's experience getting a spot to store his antique car, there can be a long wait list just for space to open up, so planning on that for an occasional long trip wouldn't be realistic.