The waiting room changed that tho, now mutants come back with their souls and only if they want to come back. But that was because scarlet witch a (human being) and avenger no less did something about it. She has the power of a reality warping elder god of chaos inside her why aren't they telling her to create a way for all humans to comeback of they want to, her mastery as per herself is infinite probability. In there somewhere she can get a probable chance where each and every human being can ressurect if they want to be resurrected mind you magneto added that tid bit. If she can crack the multiverse like and egg and erase billions of mutants in the process she can easily do so for the entire human race allowing those with reservations on ressurection due to whatever reason to stay dead and those who want to comeback to comeback. She can do this as a favour to her fellow human beings. I dont get why the mutants are being stressed on this when this process lies in the hands of five barely legal mutants. Imagine how much stress they will be put through, it is easy now but imagine when billions and potentially trillions get added simply because of humans can get in on the resurection, also what stops shiar from getting in on it too lord knows they have been better to mutants than humans have been, or the dabari who were ruthlessly genocided in the pheonix saga or any other race in the universe nay, multiverse which might not have cracked immortality yet.