Also, I don't know anyone who genuinely wanted to have children but decided not to because of the the state of the world.
I know plenty of people who don't want to have children. There reasons are "selfish" because they like their lives without children.
I know plenty of people who do want to have children and they are "selfish" because the population isn't low so they are choosing to reproduce for their own reasons.
I know plenty of people who've had idealistic views about boxes to tick before having children, but it's all gone out of the window when they've reached a certain age and needed to get on with it. How "selfish".
I even know a couple who were staunchly against having children because of the bleak future, but now have two planned children because it turns out that they put there own "selfish" needs before those of humanity.
In fact, when it comes to the haves and have nots of children the only person that I know who isn't completely "selfish" tried to conceive for 10 years and has just successfully adopted a child who had no hope without her.
Humans make big decisions based on their own "selfish" needs. Whether they choose to dress these decisions up as ultruistic is a whole other thing. The bizarre thing is that when it comes to reproducing so many people feel that they have to justify their decision and reassure themselves that they made the right choice. The fact is it's nobody else's business.