Bollocks to Musk, he's just a plant for the military industrial complex, he's not even particularly smart as evidenced by his dialogues on Joe Rogan. I don't know why people take him seriously. He is just representative of the knee-jerk reaction of an establishment that does not care about people like you and me. They just don't. Their worries about population is completely self-serving, whether it be too many or not enough; don't be fooled. They see numbers on a spreadsheet, not human beings. They do not approach this from a humanitarian perspective - continued below;
Listen, if the ruling class of Germany, the UK, Japan, etc, actually cared about their people and their countries then we wouldn't have ended up in this position in the first place. They would taken measures decades ago to make it easier for young people to afford housing for one thing, and done all that was necessary to see them happy and flourish. But instead they've done literally the complete opposite by not building enough houses, restricting development, making it harder and harder for young people to even just get started in life (as a millennial I know this keenly). They have literally sold out the futures of the young people in order to maintain a degree of opulence now.
It's no wonder that Japan and Korea have such high suicide rates in the youth, that China has the 'lay flat/let it rot' movement. We have it in the West too but in a more diffuse 'checking out' type of mentality. I mean the fact youth suicide is a thing at all is absolutely insane, we just gloss over it, but it has no historical precedent.. young people killing themselves is a clear indication that our societies are seriously broken.
Too many people. Not enough people. Until we start getting back to actual human values and get away from the obsession with the economy, which is just a cult/game played by the ruling class in order to have a slave system for their own benefit, then things will only spiral in one direction.