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People have always done and will continue to do things this way, and they will do it solely for their own benefit. And no one will call it immoral, because morality is defined by people.
By the way, if they all die, there will be no one left to read morality.
By the way, the "level" of "morality" and "spiritual upbringing" doesn't matter. There is no "level"; there are just different parallel paths, or the lack thereof.
P.S.
Nietzsche rules.