I'm all for people being happy, and I accept the idea that gender is a complicated issue. I have no problem with someone who says they're transgender, and I'll call them what they want. No phobias here.
On the other hand, the body we're born in gives us a lot more than a hormone balance. simply blocking or removing testosterone production doesn't undo all the other physiological attributes that make most men faster cyclists than most women. I have genuine sympathy for someone who is both transgender and has the drive to compete, but I think fairness demands you find a sport or division where your unique history doesn't give you a built in advantage over your competitors.
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Formerly fastest rider in the grupetto, currently slowest guy in the peloton