Those pushing for reduction in population growth are doing it for their selfish agenda, it is very stupid to consider high population as a threat to economic growth, this is why I pity nations in the west, especially Europe, they have been brainwashed to think this is good, you don't want to give birth to more children, but you keep brining in strangers to your country, and these strangers are very prolific, soon you will become a minority in their own country. The money your government is supposed to be spending on you, they are spending it on strangers, if you have a father that behaves this way, you will call him out but most people just keep quiet. If this trend continues in the next 50 years most of the European countries would have lost their identity, but the like of Asians and Africans population would have increased significantly and will dominate because democracy is a game of number.
Of course, if you look at it from your point of view from here, assuming population is a weakness is absolutely wrong. I also noticed that their European countries have few generations of their nation, for example in Japan, which has a low population level. On the other hand, I also think that what will be the future of their nation if they continue to be entered by foreign nationals, which have been built by the nation and then its generations have shrunk and been filled by foreigners, the struggles of their predecessors have become futile and the infrastructure that has been built so far is enjoyed by foreigners.
But too much in printing that generation is the same as making the government overwhelmed in managing and preparing for its future in stabilizing the economy, but in comparison it is better to have a large population than a shortage, because the consumer market will be much higher.