Yeah, I suppose its survival of the fittest becaus the weaker ones woudn't hide I suppose.Natural life cycle who cares if a couple get eaten they added to the growth and strength of other fish.
That's why when I have mine drop, I rather leave them in the tank instead of a net (besides female will be less stressed than in a breeder net), so the weeker ones and deformed would be eaten or die. I know it's cruel, but I rather not cull them myself. I have enough babies anyway and seperated my male from the females till they drop their last batch in a few months lol.