I disagree.
Since it is roadworthy, it wouldn’t be necessary for “every town” to build runways.
The closest airport to my home is ~ 6 miles away, and there are two other ones w/in ~a 20 mile radius.
If I had one of these vehicles, I could land at any of those facilities and then easily drive to my home. Obviously. this is not necessarily typical of every area, but it is also clear that “every town” wouldn’t need to build runways. And, these small regional airports do NOT have Air Traffic Controllers.
Full Disclosure: I don’t plan to buy one, even though I could.