I've heard an opinion that having less people leads to a technological regression, because some things to create/research are so expensive that they become profitable and functioning only at the world's scale
E.g. China is too small to have an isolated closed market for a competitive and efficient semiconductors manufactoring
No it is just that capitalism is a cancer. Nobody has actually cracked the code on how capitalism can work without perpetual growth.
Leaders are looking at Japan and they are panicking. Fascists are demanding more white babies.