I think some of us need to draw the line or know the difference between:
"Not everyone should have children" in a eugenics way
And...
"not everyone should have children" in a not everyone has the emotional capacity or self-awareness to take care of children.
One promotes racism, discrimination, ethnic cleansing, xenophobia, religious zealotry (ex: antisemitism or islamophobia), forced sterilization of minorities, (and before some idiot goes "ummm actually [...]", this is not including elective or medically nessassary sterilization, obviously, that's just a principal of bodily anatomy, forced sterilization is much different and should be treated as such) the elimination of queer people, hate crimes, classism and a bunch of other human right violations that have been made pretty self-evident
And the other recognizes that Children are a huge responsibility and if you don't have the emotional stamina for empathy, the patience with dealing with someone who needs attention and care, the ability to put someone's needs above your own on an almost daily basis, and love someone unconditionally then... Yeah, you shouldn't have kids. They are tiny humans that grow up to be adults and I am gobsmacked that not everyone knows that, like, you were a kid once too, don't you remember it?
And I am not saying children are easy, exactly the opposite really, nor am I saying you have to be perfect to have children, that's impossible, but people need to be more self aware of their own limits and capabilities to take on the huge responsibility to take care of a child, realize it's not mandatory for self fulfillment, and I am very much well aware modern society nowadays is very anti-family, but my argument still stands.