Everyone has their own reasons and all of them could be judged if someone wanted to do so. You feel you’re too selfish? What a narcissist! Climate change? No real proof and it’s too far off to make sense. Don’t want to raise a child in a single parent household? That’s just lazy. The bottom line is that no one has the right to judge anyone else’s family choices but those involved in the actual decision. It’s far more responsible to give though to having children, whether they will be given what they need to grow up happy and healthy and what their life will be like before the fact rather than to just have them without so much as a though to any of this.