It is certainly the case that the Black Hawk cabin is no place for a stroll but in representative fits it does work.
With 2 dedicated positions for gunners, complete with seats, with storage space for aircrew kit and aircraft consumables the troop/cargo space remains uncluttered with both doors completely unobstructed. Not to mention usable doors for the front end....
Dress a Puma for war, with guns out of the only doors, with crewman & gunner kneeling or sitting on a box, with aircraft consumables sympathetically littered around the CofG and aircrew kit stashed wherever possible, the cabin becomes considerably less troop/cargo friendly.