Nah I actually hate the grandmaster now they could've saved so manyyyy people

Idk, maybe it would but maybe it wouldn't. Erina is the first person that died, but we don't know if there will be a second Erina or a third or hundred more. Every human mind is different so maybe even if they keep trying it might work someday but their insanity won't able to hold on.

They already said it would work because the sacrifices of Erina