This is only a problem because lemmy.world has become one of the centralized hubs for Lemmy, which means that jettisoning them has a larger impact. The failing of lemmy.world is a reminder that we should be intentionally spreading out to smaller instances, that way a bad admin/instance can be cut off without losing much value. Additionally, by lemmy.world/lemmy.ml/etc having such a grip on the core of Lemmy, they are emboldened to make bad changes without fearing consequences.