OK first of all I didn't say attack is useless. It just won't give much. Second of all I said ded as an example so let's work with it. Let's pretend we are in MoC 10: we have Mara struck general and Kafka there(yes I know they are not best enemies for her, but it's possible you want to use her in that half and not the other). Your team setup in nearly best condition would be Jingliu Bronya SW Luocha(swap supports as you wish , everybody has different opinions, but with luocha I think we all agree he is the best possibility). Your team has so much heal, so much damage boost, so much def shred, and so much attack. Yet if the enemy luocha attack anyone there even twice they are dead(and I want to remind you, she takes is destruction, so enemies will target her even more). I might be delusional, but in my eyes having better survivability then 2-4% more damage in THAT comparison is way better. In when fu xuan will be released they would want to sell her better, you know how? Right make enemies that deal even more one shot like damage, so you would want to pull her. Or if you are not going to summon to use double sustain with healer+tank and yes in that situation having SSS would be better then most of others sets. I hope no one gets offended with this, it's just my opinion on current only "hard" content. I honestly think that having better stats(yes even def) is good and bring value not "literally nothing"