I do agree with you
however
There are many plus sides
The key positive impacts of a declining population include:
Lower Cost of Living: With fewer people competing for insufficient real estate, demand drops, directly easing the pressure on housing markets and making rent or property ownership more affordable.
Environmental Relief: Fewer consumers lead to a tangible reduction in greenhouse gas emissions, a lower demand for resource extraction, and reduced habitat destruction.
Improved Bargaining Power: A shrinking workforce shifts the dynamic between labor and capital. Workers often see higher real wages and greater negotiating power because labor becomes a more valuable, finite resource.
Increased Wealth-per-Capita: Some economic theories, such as those from the Institute of Economic Affairs, suggest that a smaller population means an economy needs to invest less just to maintain the current capital-to-worker ratio, leaving more capital for direct consumption and boosting average wealth.
Decreased Social Stress: Lower population density alleviates strain on public infrastructure, resulting in less congested roads, shorter wait times for public services, and less fiercely competitive educational opportunities.
Note: While these long-term benefits are substantial, the transition period involves "demographic aging," which can strain public healthcare systems, social care, and pension funds due to an increased ratio of retirees to active workers
It is a transition period that many countries are starting to now experience.