It's the same result. You're just choosing it for yourself instead of your parents having chosen for you, which only seems fair -- I know I'd rather be the one to choose for myself. But the point is that the choice, in either case, is not worth the cost when there are better alternatives.
If we were at the point that population reduction was the only possible solution then we would be soliciting volunteers, but it's not.
> However, the responses to this simple fact continue to be enlightening: people would rather commit all sorts of tortured fallacies of reasoning than change their lifestyles in any meaningful way.
Why would anybody want to do that when it isn't necessary? You can't just buy an electric car and call it done, but it's one among a collection of things you can do that sum together to an actual solution that doesn't require people to abandon their standard of living.