The flaw in this perspective is that if you're group wants to continue on to EC Story Mode and you're still using a Tionese weapon...you're more of a hindrance than a help.
And, fyi, getting loot is fun too.
If you want to go kill a boss with friends and don't care about look, then you can just continue to do EV Story Mode over and over and over and over...
...but if you want to progress with your friends and continue to have fun with them on new content, then you need the gear for it. Simple fact.
If someone was still using a tionese weapon in our raid when trying to do EC, i am sure the majority of people would be more then happy to help that person in pvp, where every votes for them, and in a night or two have enough comms to get a BM weapon for the barrel.