This is also my experince.
Think they where rondomly/procedurally generated once, but there is only a finite number of them, that always respawns randomly.
Still nobody seems to have done a rough check if they make sense or are at lest viable, the airports are usable/suitable…
There seems also zero crosscheck with live weather.
(Same with license flights, gold missions imo, those should really have fixed enviroment conditions)
Very shallow, yet still severely buged.