Sounds like they don't have the confidence to overcome all that.
It is a combination of things
It is being indoctrinated by the Left that there is no God, which then makes them lean in toward attaining as much pleasure in life as they can as their meaning in life, so they view sex as primarily a means of pleasure and not reproduction. In fact, the Left uses the term "Reproductive Rights" when referring to abortion only. Trouble is, it has nothing to do with reproduction, rather, it is simply terminating your reproduction.
Both evolution and the Bible dictate the drive to reproduce as normal, but the Left does not want that thanks to Climate change. No, the Climate Cult wants as many people as possible to use birth control, have abortions, or have a sex change so they never reproduce. And if you don't see it their way, you soon will see it their way when they go to try and survive in Bidenomics.
Their emptiness and loneliness is then only exacerbated by not being able to have children, leading to such things as the drug epidemic under Biden ,which then translates into 300 Americans dying from overdoses every day and even less people.
Sad.