Transgender and the survival of humanity

When I first saw articles like this I freaked out a little bit. The decimation of fish populations through estrogenization of waterways seems like a bad thing, and the extrapolation that a similar fate awaits humans also seems bad. But then I took a longer-view perspective and I think it will probably work out. The reason all this estrogen is going into the water is because oral contraceptives for women are an important way to control birth rates now that child mortality is less of an issue for developed nations. But there are still way too many people, and simply slaughtering millions or billions does not seem desirable. Nor do 'political' solutions to the ecological problems of too many humans seems likely to succeed. A massive, non-targeted transgenderization or de-genderization seems like a much better way to displace the priority of reproduction in gender/sexuality formation. There are some objections to this I can imagine which I won't go into now, but overall I can imagine the world being a better place after suffering a crippling blow to the global economy of reproduction.