Has it not been shown in analysis that male breastmilk is the same composition as female breast milk? Therefore for me the genuine controversy is any drugs taken and the effect that has on the breastmilk, and the broader theme of pushing something that is more for a male persons benefit - I’m all for supporting mothers but by definition if you’re male breastfeeding you are not the mother, and have concern about some examples I’ve seen in articles etc where it feels like the mother is discouraged from breastfeeding by a male partner who wants to. However if the fundamental composition of the milk is the same, the women calling it male secretions and completely different detract from the effectiveness of the arguments against this, as it’s just irrational scaremongering. Eg mypronouns men do have all the glands needed, as that journo you are criticising clearly knew well.
The analysis on milk composition is 1981 and has other medical factors so would be very useful for someone to update it more thoroughly, none the less that’s the only one I know of, it’s not like there are 10 studies showing otherwise. It’s kulski, Hartmann and gutteridge, and I’m always happy for someone more in the field to educate me on other interpretations or better reading a study, I’ve only skimmed it.