Revenant Threshold posted:

I'm not sure that works, for a couple of reasons; to start off with the other big antagonists of the film are all about not having sex. And when at the end they double-down on the whole "Kill those jerks" bit, it's through a further exultation of non-sex procreation. Back on the main plot, if sex and procreation are bad, then the revelation of Ego's killing of all his kids wouldn't be portrayed as as much of a horrifying act that it is.

It's more reasonable to point this all towards the various family-related film thoughts. Sex isn't portrayed as bad, it's treating family, whether that's biological or not, badly that's the driving force here, especially so as to satisfy one's own desires. Ego having huge amounts of kids isn't bad; Ego having huge amounts of kids and then killing them to further himself is bad. It's the abandonment, even destruction, of family and family ties that threatens the galaxy. Think too of the point on which the movie turns; it's not Ego revealing he's Quill's father, or revealing he had lots of kids, it's Ego revealing that he killed Quill's mother rather than risk that tie preventing him from his ultimate goal. And the Big Cave of Dead Kids just before that.