I meant the opposite. It is pointless for people who understand the danger of overpopulation to not have kids as long as there is a crowd of others who don't an

I meant the opposite. It is pointless for people who understand the danger of overpopulation to not have kids as long as there is a crowd of others who don't and who raise a bunch of kids. And tell them to do the same. I am not saying I know how to resolve this but don't you think there is a problem with this approach?