I think it's funnier that you're so chronically on these forums that you can recall a post I made in a different thread days ago.
It's also funny because SAM and NIN LB are not a problem, nor are DRK or AST. On their own. Maybe instead of "snip" you actually include the part you quoted and then ignored. Do you really need me to explain the difference to you? Or are you just going to ignore everything I thoughtfully typed out to drone on about western entitlement again?
For anyone else who stumbles upon this and needs clarification, "just guard" or "just run away" from 1/3 of a team is a good way to lose. Unfortunately, trying to push said team when you can die in one frame is also a good way to lose. Guard has a 30 second cooldown and can only be active for a maximum of 5 seconds. That means for 25 seconds you are unprotected. Should you just run away from the DRK/AST/AST/AST/AST/AST/AST until Guard is back up, run in, and Guard again? Not a very effective strategy, unless you want to do slightly more than AFK. I played a match yesterday on Onsal Hakair (so, not Shatter) that had one of these comps again (comprising of at least a few of the same people from the Shatter match) and while I managed to live (as BRD) and never get killed by their barrage, my team got decimated over and over and it was difficult to make any progress. Even though I survived their attacks it was only barely, with lucky timed Recuperate in between hits most of the time. Thankfully we managed to prevent them from winning, but we also didn't win ourselves. Should I have used Guard more? Would that have made us win? Should I have told my team "just run away lol" and that would've secured the victory for us?
If you can believe it, the approach to one problem (NIN/SAM) is not the same as the approach to another problem (DRK/AST/AST/AST/AST/AST/AST).
I hope someone and maybe even you (long shot) understand my point a bit better after this explanation.
Enjoy the rest of your time on the forums.