Kind of a complicated ethical dilemma. I see it with people who are trying to preserve "heirloom breeds" of livestock. There are pigs whose ears cover their eyes. Pigs whose fat folds cover their eyes. Pigs with such tiny legs and fat bodies they can barely walk. Chickens who can't function as chickens because of breed traits. But some people want to preserve those breeds. I don't believe that just because a breed (or morph) exists, that means it needs to be preserved and continued.
And if a human has a genetic/hereditary disorder, it would be the responsible course of action to consult with a genetic counselor before deciding to make their own babies. Not that anyoen should force them to do so. But I would hope they'd want to.
But if that genetic disorder doesn't severely impact quality-of-life, meh. Do whatever you want.
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