Up until 10,000 years ago there were no more than 5 million humans on the entire planet. If we could go back to that maybe we can live another 10,000 years. But the cretins keep cloning and feeding. More humans destroy the value of humans to other humans. Just go to India, or hell go to America, see how little people value each other. The reason is too many people. They shit over everything, eat all the food meant for animals, and their desires destroy all nature and convert it to acreages, houses, and cities. The number of humans is too damn high, vote for the human population reduction party.
The biggest problem is not how many but how we are living.
From our mostly meat diet to our inefficient mostly individual transportation systems to our consumerist society that produces tones of useless garbage all of these with very high carbon footprint, pollution and big environment impact.
And all of this just to satisfy some old human habits that are no longer possible at this scale without irreversible damage to the ecosystem.
If the cretins didn't keep procreating and feeding, you wouldn't have half the life expectancy, quality of life or knowledge that you have today. Humans create a ton of value, even if we are destructive sometimes. We just need to figure out how to keep growing sustainably.