Obviously the human race somehow made it until we created developed societies. I think you are confusing survival of the human race with survival of our current pension system.
Who knows if it's really better or worse to suddenly allow everyone to reproduce?
For sure it's not "natural", and as far as I can see it would actually reverse evolution to regression instead.
And it seems like we can't really stop it anyway with how many men today are becoming outsiders in society because they get rejected to reproduce.