> It sounds like they're saying that if someone is committed to a mental institution, rehabilitation could be a bad idea because it's just as likely that they're not fit for society.

I'm saying if we make unexamined assumptions about who's "fit for society" it's easy to sacrifice non-normative people on the alter of social harmony.

What is viewed as requiring rehabilitation can reflect neuroses endemic to the broader cultural context, not merely or necessarily the dysfunction of the institutionalized individual. It's a two-way mirror.