I've read quite a few posts in this thread (Far from all, starting at the top) and I'm happy to see there's a lot of anti-natalist sentiment in here. Saw some arguments I find really bad, but general vibe is that it's immoral.
To me it's a very easy question, being a practitioner of bdsm in the local bdssm community, we hear about it all the time. Consent. Consent is the cornerstone of what we do when it comes to moral actions. We speak about how consent should be freely given, reversible, informed, enthusiastic, specific FRIES for shorthand.
Do the person being born freely give consent to being born? Definitely not.
Is it reversible? Not really? I mean kind of. But also not. Closest thing to reversing it is to die. But I know from personal experience how grueling and soul crushing it can be to even attempt it, and it's not like I can go to a doctor and get help. Assisted suicide is illegal in most contries, simply knowing someone is about to go through with it and not reporting it can be criminal in many places. So while it's technically reversible. It's heavily gatekept.
Informed? Nope, not a chance. The person being born can, as far as we know, not know anything. (I'm an atheist and don't believe in spirituality, but for the purpose of this post, I won't make definitive statements on such matters.)
Enthusiastic? Not a chance. They don't exist. They can't show enthusiasm.
Specific? No, just because you consent to one thing doesn't mean you consent to another, mind you. The person being born haven't consented to anything. Specifics aren't even in the picture here.
When it comes to other antinatalist arguments I want to adress aa few of them here: Overpopulation, no. There's no real reason we can't support a population much larger than the one that exists at the moment.
The problem is profit incentives and the system of capitalism and greed we live in. As well as the standard to which we adhere to when it comes to food appearance. A very sizable portion of food is thrown out simply because it doesn't meet our beauty standards for food. Not to mention the food that goes to waste just going bad in people's homes. Or what's thrown out because people don't want to deal with leftovers. There's plenty of unused housing already and there's no reason we can't build more in decent locations, problem is that land is more valuable as a commodity than human comfort is to most people. So people having a place to live isn't a priority.
Suffering: Yes. So... Suffering is such a subjective thing. Most people suffer, but no one experience suffering the same as far as we know. How much you're willing to suffer is also highly individualistic. But in the end I think most people suffer, and even if some don't, it doesn't really matter. Sufering in itself isn't neccessarily bad. But unwanted suffering and non consesual is bad. Ergo, subjecting someone to that kind of suffering is immoral. This is unfortunately a relatively weak argument just due to how subjective suffering is and how it doesn't really... Mean much in of itself. But it's a strong support for other arguments.
A lot of people are not okay with the suffering they've been forced to go through. People are victims of a system that doesn't actually care about what they want or how they feel. As long as that system exists, excusing having children is the same as seeing this suffering as acceptable for the happy people's joy. In other words. My/our suffering is acceptable because they get to have a good time. To have a child under these circumstances is not only a non consensual act. But it's also feeding into the system of suffering that sustains a certain proportion of happiness. I don't think it matters much how much suffering there is vs how much happiness there is. The issue is that the happiness they feel is at the expense of our suffering.
There. Sorry for the very long post. This is a subject I'm very pationate about, so it just ended up that way.
Thank you for reading and hope I don't get shunned from here like I've been from other places I speak about this.
TLDR: It's immoral, there's no real consent mechanism for the person being born, and there's no good way to escape life. Also, the joy many people justify life with is at the expense of those who suffer.