My dad still uses language like "C'mon! Be a man and do {this thing}."
Personally, I believe when I'm old and crotchety the winds of society will leave my language at something like "C'mon! You should do {this thing}." and leave the gender out of it entirely.
Anedotally, the three people I knew before transition who later transitioned have all expressed some form of process "I was depressed and didn't understand why" -> "I had these thoughts but suppressed them because I felt they were weird / unacceptable" -> "I learned what transition is and the pieces fell into place".
Edit: over a period of many years, that's why they were late transitioners!
You know like, Quentin Tarantino isn't racist even though he said the N word, but if I'm walking down the street and a total stranger comes up to me and starts throwing the N word around, safe bet they're saying something dumb.
See my comment a few days ago about "The Internet is graffiti in a bathroom stall". I could probably have a calm good-faith conversation with any of you in real life about gender. But not on a web forum.