I don't think someone needs to be particularly antifeminist to see that mainstream discussion of gender has tended to "other" men, placing men and boys in an oppressor category, ignoring how the discussion might affect them, or genuinely blind to that reality.
While it's true that the term was coined during men's movements of the 80s/90s, it had a different contextual meaning then: more like a counterfeit male code to be contrasted with the idea of a true "deep" masculinity. Apart from that difference, the reality is that most men and boys are not part of a today's "conversation" about masculinity, but instead feel like it is being imposed on them.
WanderingCascadia
bananaghost