I do not think it is ethical to trick young people to self sterilize. Now only people who maintain their valid biological sex, are not being sterilized. Is this about selective evolution, with the Left selecting who will be sterilized, based on who takes the bait?
The Population time bomb, was one of the sky is falling Liberal paranoia of the past. They tried all types of strategies to get people to have fewer children. They had to settle with condoms, birth control pills and abortion. They did try to push for sterilization but the Courts fought this, even for inmates and rapist. They were clever and persistent and finally figure out a way to get people to make these those choices, and not even know. This brings us to the transgender self sterilization fad; take out the guts.
The Left hangs onto unfulfilled social changes. They hated fossil fuel since the 1950's. They started with the scare of running out of fossil fuels, so people would conserve and use less. But upgrades in exploration and extraction ended this approach. They finally found the global warming and then climate change scams. This allows their old enemy to become your enemy. Sterilization was a matter of time and needed a good plausible deniability.