"Because the M’Kraan Crystal is dumb." Well it's still canon and part of continuity and you just calling it dumb gives merit to the people who think you are out to destroy continuity or only use it when it pleases you. It's just plain wrong sir

How many alternate realities have been destroyed over the years, well before this cycle of stories began? Quite a few. And the existence of alternate M’Kraan Crystals were irrelevant—nothing happened involving it as a result of those universes becoming demised. So there’s nothing to address—clearly, the big pink gem doesn’t work that way.

M’Kraan Crystal = dumb.