When "healthy" is assigned a moral value or viewed as being more human than somebody else, it stops…
When "healthy" is assigned a moral value or viewed as being more human than somebody else, it stops being a useful method for prescribing treatment for an illness, and it becomes a tool of conformity and eugenics. I strongly suggest you educate yourself about psychology & psychiatry's histories; we (speaking as a psychologist) have used a purported interest in "health" to eradicate the lives and rights of many people over the centuries. The Protest Psychosis, Nobody's Normal, and Madness in Civilization are three great books to start with.