Nations are deploying baby bonuses, subsidised childcare and parental leave to try and reverse a rapidly declining fertility rate – largely to no avail
Because some of us like that there is a humanity and want it to continue. Some of us still have hope for the future instead of letting an array of problems depress us. Some of us know we can do better. Some of us are alive.
I don't think you need overpopulation to do that. You can probably live a better life without so many people suffering and competing for scarce resources or fighting over jobs and land. I value quality over quantity.
Scaling humanity gives more opportunity to move forward in more areas, more intellect, more skills, more specialization. If there were no living constraints, the more people, the better.
The constraints on our living space, available resources, healthy environment is the only real limit.
We need to find a balance with a critical
Mass of humanity to continue to grow and improve, yet live within available resources while maintaining a healthy diverse environment.
Scale never stopped progress before. We're reaching very real limits and a possibility of environmental collapse soon. We're way, way past finding critical mass by billions of people.