A person can grow more food, build more homes, improve the environment, improve energy usage, staff schools and hospitals. Every negative issue with overpopulation can be countered with a person.
But there aren't enough useful people. And I think this is an issue with the system. We do not need more people whose life goal is "financial freedom/FU money", minimizing taxes paid, and becoming parasites to society. We need more people creating wealth, but most people are obsessed with trying to get a larger slice of wealth while contributing as little as possible.
We need to stop trapping people in poverty, where they're useful only for minimum wage labor, but become a burden on the welfare system. Nobody wants to live like this, but poverty means they have no choice.
A hack might be only letting people who want children and want to take care of children have kids, and have multiple kids. While those who don't like kids get improved access to birth control.