Well, it's a simple equation from a societal health perspective.
As things are currently, society is well below the minimum and ideal birth replacement rates (scarily low in fact). So from that perspective, promotion of homosexuality runs directly counter to what is best for society as a whole versus what is currently seen as best for any one individual.
> Your opinion and the actual growth rates do not seem to be in agreement.
Believe me or not, it makes no difference to me. I know I'm right.
Even the resident HN golden boy Elon Musk has been very outspoken recently about his significant concerns regarding the forthcoming population collapse. So it's happening whether you want to acknowledge it or not.
Human society survived just fine with one quarter the current population 70 years ago. Why can't it survive with that again? Especially now that we have better technology that makes each human much more productive? Unless you can only look at the world through the lens of capitalism (which requires infinite growth)... but capitalism is definitely not required for humanity in general (human society existed before capitalism and will continue to exist after it).
It is a bit telling, that you perceive it as "promoting of homosexuality". I am not gay and I don't see anything like it. What I see, is promoting of a idea, that people are free to live their (consented) sexuality, whatever that might be, instead of forcing them to live an unhappy life not fitting to them. That is not really good, if you want stable people. And without stable people you won't have a stable society.
And about birth rates in general, that is a way longer debate. I would start with world population and limited ressources, but rather leave it at that.
As things are currently, society is well below the minimum and ideal birth replacement rates (scarily low in fact). So from that perspective, promotion of homosexuality runs directly counter to what is best for society as a whole versus what is currently seen as best for any one individual.