The practical problem is resource scarcity. We're already destroying our only planet with 7 billion people living only 72 years on average. If we manage to get

The practical problem is resource scarcity. We're already destroying our only planet with 7 billion people living only 72 years on average. If we manage to get through the problems we've already created, it'll be a miracle, and it is safe to say that without a lot of other problems besides longevity being solved, there is zero chance that a significantly larger population would make it. The problem is not resource scarcity, it's pollution. For example, Americans pollute far more than Indian, despite having a smaller population.