why so much players have a rush mentality

[SieyaM]

Name dungeons with pulls that behaves differently from one another then? I can't think of any dungeon where you'll have to tank mobs differently. Tanking mobs at Sastasha is almost identical in fundamental to tanking mobs in lv80 dungeons: pull, round them up, AoE, rotate cooldown, probably stun or interject some mob that cast something dangerous, avoid red carpets, rinse and repeat, don't forget tank stance too, then done.

I do aware there are few exceptions where you want to slow down a bit because the risk just isn't worthy like Aurum's first room, but beyond that, what else? One may not remember a few of boss mechanics but trash mob pulls are all virtually the same.

So you aren't using any tank CDs for mitigation then?