That's not my read of chapter 5 at all. At the start it says:
'in both situations, the milk-making tissue in the breasts/chest starts from
a non-lactating state and needs to be stimulated to make milk. Those who
have been pregnant (or have fed a baby before) may find it easier to make
milk than those who haven’t, because pregnancy changes milk-making
tissue. However, this is not always the case.
People who have never been pregnant, who no longer have (or have never
had) ovaries or are past menopause can often produce some milk to varying
levels. This is unless there has been surgery that has removed all of the milkmaking tissue or severed the ducts to the nipples. This is very individual.'
The first is about women.
The second I would read as women because of the reference to milk producing tissue and ducts.
I did find one reference to males in that section-
' how much milk people assigned male at birth can make is still unknown,
but in one case, a parent who had induced lactation reportedly produced
240 mL of milk per day.'
I am all for sharing and discussing the loss of words etc etc etc.
For me, the document has been misrepresented here and I don't think that's helpful.