I note people like to use the unhealthy and healthy labels for functions.
Personally I loath it; its a case of 'your ideas are different from mine and this makes them unhealthy'.
They are usually coupled with a few oxymorons, such as 'lack of compassion/understanding/reasonableness/consensus is unhealthy'.
Of course these factors all have a healthy part to play in any individual. For without them there is no way to deal with the abusive natures of other individuals and to set up the barriers required to live a normal and indeed happy life.
I would suggest that those who use the unhealthy label are potentially very closed minded as they don't seem to accept that others are allowed to have and express their own opinions and are in effect attempting to use certain fuzzy labels to make things how they view it to be 'right'.
More importantly I've never seen any sort of typological discourse which discusses unhealthy or healthy states in more rigorous typology discussion and literature. I might say it's a uniquely invented paradox of online typology communities and has little to do with cognitive functioning but everything to do with those who use the labels.