That's the problem right there: by asking the question like that you are essentially saying 'children are for the wealthy'. And that's also not how it should be. This is a super hard problem to resolve in a fair way that works in an international setting because you need everybody on board otherwise it will not work. It's the tragedy of the commons endgame.
This is a problem; with the inertia the system is carrying where there are no "ethical" choices left. That's of course no excuse to pick a horribly fascist and evil one. Yet that seems to be the inference in any conversation where you point out that fact that we're basically fucked. "Oh yeah, well obviously you are a genocidal monster. That must mean we're not fucked."
Uh, no. I'm watching this garbage truck smash into the wall, same as you. We're all in the same boat.
I don't care about what people call me, I'm just pointing out there are too many of us. Historically when there were too many people we ended up with wars or famine. I don't think this time around it will be an exception to that rule, but it's the first time this is happening at this scale. In that sense all bets are off, it is also possible that given such stakes humanity can find it in itself to pull the cart as one but I'm not too hopeful about that.
We could easily be in 'adapt or die' territory somewhere in the next century.
We're well into 'uncomfortable truth' territory on this subject, so you can expect namecalling and downvoting rather than discussion, nothing surprising but people don't like to hear that their life style isn't sustainable.
The majority of people around me would rather invest in holidays and luxury goods than sustainability and aim to increase their footprint rather than that they reduce it. I'm just as guilty because I too live in a wealthy country. And even though I bike when I can and have spent a small fortune on making this house less dependent on outside energy I make myself no illusions: I'm still a net negative on the environment, far in excess of any developing world denizen. All I have to do to have that reinforced is to look at our trash can, food bill and fuel bill for the times when we do drive. Each of those alone is probably well in excess of our 'proper' budget that would be sustainable.
And for the life of me without stopping all activity I have no idea how I can further reduce it, this is just the world I happen to live in. I guess I could not have had kids, I guess I could live in a tiny shack. But overall everybody in the developed world will increase the problem by virtue of being alive. That's not good news, but I don't have anything better.