Consider also that receiving HRT requires you to convince your doctor you are trans, and Informed Consent comes into play. They would likely be informed of all of the side effects.
I would say that the 10% of cis men who wouldn't experience dysphoria in your hypothetical weren't cis in the first place. In fact, anyone who transitions to "own the libs" is probably just trans and scared.
No, "Springfield" is a very common town name (especially one founded not on a body of water or river but in a field with springs), which is why The Simpsons selected it. May as well have been "Anytown, USA".
Anyways, the hoax of Haitian immigrants eating cats was supposedly happening in Springfield, Ohio. It's baseless but that is what Trump fell for, not a Simpsons sketch or anything like that.