The world is composed of a lot of people who just want to drag others down. Basically it's all competition. Why bring someone into this world if the whole point is to put them in such a jeopardy (i.e if they have to survive they should compete for the mere basic amenities which should be avialable for everyone no matter what). Why even start such a race. Better is not to participate in a race to death. Now, I get it, there is a lot of positivity in this world and people are not always terrible blah blah.. But when it comes down to core survival, which is securing a partner, getting a job, putting table on the food etc, these same people wouldn't mind adopting unfair means to do so. All this positive people and other shit is an island in the middle of the ocean of negativity. Why even be a part of such a world. That is why, don't have kids and you will be doing them a favor.

Why we want kids is because of basic biology. We don't want to feel alone in the end years of our lives, we want to feel important. Even if it means pushing them into a world full of predators. Just think how sick it is.