Self-diagnosing is just part of the current fad of credentialism in discussing the psyche. Nobody can exhibit a pile of adjectives. They need to be attached to a proper noun from a book to be acknowledged. If there isn't a proper noun attached, the individual's external nonconformity or internal dissatisfaction are just a personal failing for not having fixed themselves already.

And ironically it makes society worse at supporting everyone, even those for whom the proper noun is appropriate.