What survival ?? humans sired mutants. They dont puff from the ground neither come from the space. The husband wanted kids, maybe some of this kids could be a mutant.
If it was truly survival everyone will be at Krakoa destroying everything, and from the begining the X-Men will always be antagonistic.
This doesnt happen because many heroes, probably, understand that this is a natural course.
Like Corsair, then, what Orchis had is either irrational hate or irrational fear.