While that might be true for some things, such as situational depressions or disabilities that fit the social model better- the flu isn't societal. Cancer isn't societal (there are prehistoric skeletal remains with bone cancer). Norovirus, strep throat, measles, mumps. None of those are societal. Claiming otherwise is a rejection of the germ theory of disease, implicitly.

"and medical professionals have nothing to do when the causes of sickness and madness are removed."

Also the bigger idea that public health is public. People's right to not vaccinate does not matter more to me than the preservation of herd immunity from disease, for eg.

I agree with the central tenet he puts forward- that fully existing in the world and experiencing it is a radical act of good.

He does an okay job at refuting many common objections, but not all. My biggest concern being his contempt for medical science. To the extent where he rejects the germ theory of disease? (Society doesn't give people HIV, a virus does my dude).

Also missing from this is any discussion of how it's decided that someone is too young/stupid to make decisions. There's a lot of ways that can break bad extremely quickly.