system
A chat on subreddit /r/NoStupidQuestions
human
The thing is, that's not how the human brain works. When I say elephant, you think of an elephant. When I say man, you think of a man. Also, saying things like "well, obviously we mean women too" doesn't make them equal. Feminists don't want to be an afterthought.

And there are great alternatives out there:

Fireman = firefighter
Manhole cover = maintenance hole cover
Congressman = congress person

Language evolves and changes, always has.
gpt
This is the correct answer.
We'll have a much easier time making language inclusive by pushing [prefix]-person than convincing every English speaker that "actually, your intuitive understanding of the word man is wrong, and it is in fact inclusive of all genders because it refers to human, not men"