There is considerable division within the community; I know a lot of bf supporters and lact consultants who are very GC. But have to be quiet due to pile ons.
I also think more discussion and fierceness tends to happen in sling groups. Doulas obviously advertise and engage in those groups as mothers are more likely to get a doula second time round.
This article is very good and I really don't think many have made the full link.
From observation, (especially for some reason in sling groups) the parents are younger and it's around their young boys identifying as girls.
As the parents get older they leave the groups so few are there talking about their teen girls removing breasts.
Also, many slingers didn't bf. Women tend to remain in sling groups longer than bf groups as it's often a good place to sell stuff, find out local info for days out etc.
Mastectomy seemed to be less common previously and more transmen seemed to have breasts to feed with; I think the wave of girls who've had mastectomies is yet to hit the stage of child rearing in a way that will impact.
I do not understand Doulas who are so aggressive about all this. It goes against everything that a doula always stood for.
It's also why so many were so cross with the lactation consultant who wrote an otherwise great book about breasts, only to include a description of a girl choosing to remove them.