I think if people are honest enough to not want children, they definitely are not candidates to have children. For whatever reasons. Many realize the massive gravity of the responsibility of raising good kids and the dedication that requires, and believe in not half-assing it for the rest of us. I wish more people thought harder before phoning it in and doing a piss-poor job and giving us ferals and multi generational welfare minded gimmefreesh1tters.
Learning to care about what needs to be cared about can be a life time things.
Some lives, not their own fault, start out in poisonous circumstances. If you don’t think you can love the kids the right way, it would be a huge mistake to get them for ego fodder. That just spreads the poison. Though it would be hoped that even those would have enough conscience that if they had a one night stand, bring the kid to birth and have it adopted.