If it is a stupid game thing (driving on a flat plane, two ground segments intersect and appear fine to a person, but flip a vehicle like a game does), then it makes sense and is likely WHY this command exists, with the Rights Management definable by the Server License Holder to control use or misuse of it. Misuse might be an idiot driving over something a vehicle should not, and getting stuck - therefore using a command like this is almost cheaty and outside the spirit of a military simulation style game.
BUT it certainly should function as intended, and this is the first I've ever heard of the flip command not being sufficient for unflipping vehicles, let alone any abuse of flip that would lead us to want to restrict it beyond the current "everyone" default setting.
Games are games, and they can get gamey -- in Arma, we have other vehicles we can use or put on the server/mission to deal with such things.. mods or just scripted ... and also console commands -- PR doesn't quite have the leeway to do "whatever" like a sandbox to include immersive 'unflip' tool vehicles like a tow truck, helicopter sling/hook, and so there's that wall of what should be and what has to be to maintain functionality (even if it could also detract from the immersion or spirit of gameplay mode)