Maybe, just maybe, because historically the concept of german airborne troops was scrapped completely and fallshirms were just another (mechanized) infantry. You know, losing air superiority, casualty rates of falls etc.
So, what it actually doesn't make sense is for them to BE delivered anywhere by plane in late war MP setting.
Wasn't Crete the last major German use of paratroopers?
So yeah Kaitof has a point on axis troops. Still think Commandos (or UK paras) would be better coming from the air rather than ambient buildings.