It is true that sometimes abundant human resources due to a large population in a country sometimes have a positive impact on a country's economy. Especially if the country is led by a government that is able to manage state finances and the country's natural resources well. Because economic problems actually more often arise as a result of governance that is wrong and not in accordance with what it should be.
The larger the population, the more complex the characteristics and traits of the society become. This, of course, presents a unique challenge for governments aiming to serve as a central authority for a cohesive citizenry. If a government fails to earn the respect and trust of its people, poverty rates are likely to remain high as a consequence.
China serves as a successful example of implementing a strong work ethic, and India seems to be progressing toward emulating what China has achieved. However, it's important to recognize that neither of these countries has been entirely successful in providing for all their citizens. Both nations still have significant pockets of severe poverty, so perfection cannot be claimed. Nevertheless, China and India serve as good examples for governing countries with high populations.
You are right. Because high poverty rates are still more common in countries that have high population levels. In essence, all countries have their own problems, whether they are countries that have the highest population levels or countries that have very small populations.
Even in Japan, where the rate of population increase is very low, it actually also has a poverty problem. It's just that it's not as much as in developing countries. There is an area in Japan that is inhabited by people who are not financially good. Many even sleep on the streets.
In fact, many Japanese people don't want to get married and have children because they are too worried about the economy. So a baby recession occurs there.