Third places and opportunities to meet people are greatly reduced because everything's taken over by venture capital chains and so expensive, and even if you meet someone the odds of the two of you making enough money to afford to raise a child is low.
If you have that money, you're probably educated enough to see that life for your child will be significantly worse than life for you right now - the rise of authoritarianism, climate change, the active ongoing destruction of American economic power and soft political power, the concentration of wealth in fewer and fewer hands, disinformation causing massive chunks of the country to oppose science, education, and other things, discrimination based on gender and race....we're in for some very hard times and it takes a certain mindset to decide that you want to subject a child you love to all of it.
It's not the dogs.