In a game which is part PVE and part PVP, there has to be a balance somewhere. Having a spammable shotgun that 1 shots you with good aim and a literal instakill with the mando sniper, sure, that might be realistic, but you have to bridge the gap to actually make the game fun for others. Every person with the overpowered weapons is going to cry if they get removed, but they have literally ruined the whole point of gathering in-game credits if they can just buy an all purpose weapon from the shop and destroy anything that comes their way. It's detrimental towards event jobs, it's annoying during entertainments, and the fact that GMs have to specifically ban the use of these weapons during their deployments speaks a lot for how much they change the way the game functions.
+1, either nerf the fuck out of the them or remove them entirely.