LGBTQ folks probably have fewer children than the average. The demographic challenges we face are in scaling services to support the global population. So wouldn't freedom of gender expression, if anything, make things easier?
Assuming that queer people will somehow take over the world and cause an unsustainable birth rate sounds a bit like the right-wing "gay agenda" conspiracy theory. Not to mention that people born with a vagina can have a male gender identity and still get pregnant, and some trans women can get others pregnant. Sex != gender. Also because gender identity isn't just a lifestyle choice, it's not like all the straight people will somehow get converted.
Assuming that queer people will somehow take over the world and cause an unsustainable birth rate sounds a bit like the right-wing "gay agenda" conspiracy theory. Not to mention that people born with a vagina can have a male gender identity and still get pregnant, and some trans women can get others pregnant. Sex != gender. Also because gender identity isn't just a lifestyle choice, it's not like all the straight people will somehow get converted.