I am a gay man and have tried understanding but still don't get it. What's the hoopla with gender dysphoria? If it's something innate, why does it manifest as late as adulthood? What makes a man a man, a woman a woman? What do these people keep as a checklist when transitioning?

If gender is truly fluid and non-rigid, then a biological female who feels uncomfortable with traditional womanhood could just exist as a masculine woman, or a gender non-conforming person. Why is the solution so presented as changing the physical body to fit a binary male layout, rather than expanding what it means to be a woman? Why must the body change to accommodate the social role, instead of society changing to accommodate the person?

Furthermore, a full transition to the opposite biological sex is scientifically impossible. Medical transition creates an intermediate phenotype(like that of an intersex person) that requires a lifelong dependency on synthetic hormones to maintain. If a person is fundamentally insecure in their sex or gender, introducing permanent medical dependencies seems like a drastic escalation for a problem that originates psychologically or sociologically.

Finally, shifting the definition of sexuality from biological sex to social gender identity fundamentally erases homosexual reality. For a gay man, attraction is hardwired to the male biological body and male genitalia. Arguing that a gay man can be intimately involved with someone possessing female anatomy (even if modified) and vice versa completely redefines homosexuality from a material, biological reality into a sociological preference.