*scratches head*

Because when I play as tanks, I don't want to burden healers even more during big pulls by taking unnecessary damage when I can just move out from AOE area. *Especially* since I can just return to the original position very easily so positioning for melee DPS rarely become a concern. *Especially* if the DPSes in my team are all ranged, so positioning matters little. Even without avoiding the AOEs the concentrated damage from big pulls mob can be devastating.

Why wouldn't you try to avoid unnecessary damage? I play mainly as healers, and it always annoy me when someone took damage from something that can be easily avoided, so that I need to use additional resources to heal them.

"If there is 5 AOEs there's something wrong with the party" I mean what even is this? When you big pull everyone AOEs from them all can be numerous, I mean can you even reasonably prevent big pull mobs to not bombard you with AOEs? (Probably only with Holy, but that is temporary and what if the healer in your party is Astro or Scholar?)