At this rate, they slowing down population growth in the era of Climate Change. Climate Change, of predicted correctly, means a lot of land on Earth will be underwater, and a growing population with less land available means chaotic fukkery with bigger populations fighting for less resources.
They promoting homosexuality for reducing the population growth, in a non-authoritarian way. Gay people are still human beings, its just that their lifestyle is being promoted by the powers that be for more sinister purposes, to stop population growth in places of the world where people still have mad kids, like Sub-Sahara Africa.