People are simply scared from the hard endgame raids due to the community. I have yet to clear T6-13. (T7 is already cleared)
But honestly I want to do this raid for the story and the cutscenes.

But seeing Party Finders with messages like "Know your shit or gtfo!" makes me very hesitant to join one or create one. I cleared T1-5 with party finder but back then people would give me death stares for watching the cutscenes in the dungeon... So yeah, community is what is chasing people away from endgame content.