By Butter's logic, a baby girl washed up on an uninhabited island and growing to adulthood without contact with other humans wouldn't be recognised as a woman by the first sailors to find her, because she'd not had the requisite womanhood training.
Like all genderist thought, there is an insight about gender here - that the specific experience womanhood within a culture is socially constructed, but like all genderist thought it's a simplistic and superficial take which takes the result of a complex process as the whole thing.
As a girl grows to womanhood she experiences:
The physical experience of being female
The way people with bodies like hers are portrayed in her culture
The way people with bodies like hers are treated in her culture
The way she is treated in relation to her own behaviour
The attributes, behaviour and experiences that her culture values or rejects for people with bodies like hers
Her own self image, ambitions and preferences in the context of all the above
The social factos and drivers she experiences changing in response to how she herself changes
And all this through similar sets of lenses for her race, her class, her wealth, her family relationships, her place of upbringing and living, her physical and mental health, her intelligence, her physical prowess, her attractiveness and many others.
It's an incredibly complex process that is feeding back into itself and mutating through her entire life.
There is no "woman training". There is the interaction of many many different external factors on a female person and her own internal responses to that,.again and again and again.
Butters believes Butters has experienced "woman training" because Butters has observed the social expectations on women and perhaps even the unfair treatment we face. I'm sure Butters feels the way men treat an effeminate male, insulting him by pretending to think he is "a girl", is the same thing women experience.
Butters is forgetting that the woman in the middle is an active part of the process, and that to experience this from birth, knowing this is about your body, the female one you were born with, and knowing people will see that body about you always and it will always carry those social constructions, and that they are also part of you and something you won't ever truly escape, is an entirely different thing to seeing it happen from.the outside and imaging it happened to you. Not least because the process creates the you. You can't think "this is what I'd have been like if I experienced that" because (aside from it being far too complex to predict in that way) the personality thinking that would not have existed had they experienced it.
A male person is never going to experience society's treatment of and constructions of womanhood in the same way as a woman because so much of it is rooted in constructions about the female body and the experience of existing in that body in that social context.