Even though I’m not a woman, as a member of the human species I don’t feel a need to make feminism about my specific male struggles, or me, because when the least of us are held back we all fall behind. By this definition, meninists need to just get with the program.
Why “Meninism” is the Reason We Need Feminism
Wendell Bernard Britt Jr.

That’s why the term is meninism. They’re not trying to co-opt an existing movement.