Transgenderism is a semantic trick
They are males who want to be females. Not just "the social roles of females," because they imitate female biology with surgery. They dislike words that reveal their sex and want to use words for the sex they imitate.
So they redefined "woman" with crazy ideological terms, claiming "gender" is a "social construct" distinct from sex, and made "woman" refer to "gender" rather than biology.
Now everyone hears the word "woman" and assumes they are female, while in reality they are male. They have deceived everyone and justify it with their redefinitions.
You can use this same trick for anything. Pick any category: sex, age, race, species. Invent a "social" version: social gender, social age, social race, social species. Redefine all related words to refer to the social version.
One could claim there's a difference between "biological age" and "social age," and then redefine words like "baby" to refer to the "social age" instead. So a guy in a diaper could enter a nursery.
They'll cite "suicide rates" and "harm reduction" as if that makes the transitioning from man to woman seem more plausible than the idea of transitioning from human to animal. But by that logic, if people who identify as dogs started committing suicide, species would become a "social construct" too.