Yea an assault helicopter transports troops to many locations and brings with it enough fire power to suppress anybody on the ground, however, it’s somewhat common that helicopters get hit by rpg’s and similar things by ground forces as they are landing or about to land so it does happen that helicopters crash land when deployed into the middle of a firefight and everybody climbs out rapidly and now are stranded. These personal airborne mobile weapons platforms (I’m sure there is an acronym there somewhere), would be much more effective if there was a swarm of say 20 of them. You couldn’t just shoot an rpg at all of them and they would have the high ground basically always and could just rain fire down on you from basically all angles.. sniper nest? Better be an igloo.. top of a building? Not enough cover..

Another place they could be used is to escape following a covert raid.. you would carry or stash the platforms someplace near the operation before hand then jump on them and all take off, you would only hear them escaping.