20 years ago my friend came out as trans (FtM).

I can tell you with 100% certainty that if anyone at school had actually seen her as a man, they would have beat her ass so hard. Guys can't get away with hanging out in the bathroom just to comment on the penis of every other guy who goes in. She did.

Guys cannot grope other guys girlfriend, or sit in other guys laps. She did.

Guys cannot wear diapers to school and insist they are 13 years younger than they actually are. She did.

I have no issue with someone wanting to live their life as another gender, but you either need to actually live like the other gender 100% and not try to redefine it, or acknowledge to some extent you are not that other gender, but just adopting certain aspects. There is nothing wrong with being a girl who loves sports, or a guy who loves getting their nails done. It doesn't mean you are trans, it just means you like that thing. If a dude wants to wear dresses, that's on him. But I also have the right to think it looks rediculous and laugh when I see it. Because freedom works both ways.