Same sort of situation with Jubilee helping out Nezumi and X-Man helping some rando mutant after they fell in a frozen lake. One has an actual messiah complex and believes it’s a necessity to play God, while the other is doing something out of pure empathy for their situation. Even if it may not end up mattering in the end, the X-Men are still helping mutants out of the goodness of their hearts even if they’re pissed that they’ve spent three or four months in a “fake” world away from their loved ones.
Makes sense, Nate vaporized them from the Earth and all he had was their collective essence. He created a new way for them to exist and have a life, but they’re practically dead by “universe standards.” Hell, even the new mutants introduced in the Age of X-Men are really just 616 mutants. They just got a living upgrade and that upgrade is living in the baby of Nate Grey and the Life Seed.
They may explain it in this issue.