You're baffled people aren't having kids? What bubble do you live in? People straight up can't afford housing much less children. The avg American is completely priced out of owning a home right now. Edit: the replies - y'all are out of touch. Visit an average family in the Midwest with a household income of < $100k/yr that doesn't own a home yet.
* Life is a hellhole. My children must witness my (and my hypothetical spouse's) deaths; witnessing death is a fucking hellish experience, I motherfucking do not desire to force that experience on anyone let alone my children.
* The world will continue. The Earth has spun and travelled around the Sun for time immemorial and will continue to do so regardless of any decisions I make. My existence and any existences I might create are utterly and absolutely pointless in the grand scale of the universe.
* The human world (in contrast with the world at large) is a fucking hellhole. I have absolutely no desire to bring new life into this human world and tell them, with a straight face: "Welcome! This is hell I brought you into. You will suffer many tragedies, you will be wronged so many times you won't bother keeping count. No, I can't help you. Have fun." What the hell am I, a sadist?
* I have many other activities, dreams, and goals I wish to accomplish that do not and perhaps even run completely counter to having children. Life is short: I only have so many hours left and none I can or will spare for offspring.
* I find the idea of compromising my life with a spouse to be a violation of fundamental human rights. Who am I to demand my spouse to bow to my wishes? Who is my spouse for them to demand I bow to their wishes? The answer is noone: I and any hypothetical spouse are noone. All men are born equal, with certain unalienable rights, that among these are life, liberty, and the pursuit of happiness. Thusly, I swore to never marry and (also consequently) never have children. I am far too busy with my own life, kindly and sincerely please fuck off.
So yes, I can afford children. Many children. No, I won't have children. I can't wait until I am automagically ejected from the marriage market I never even wanted to be a part of.