Some traits are mostly-negative traits. That's just the nature of life. I'm fat/obese/overweight/slow/thick/plus-sized/curvy. It's a negative trait I have. Someone referring to me in that way can be fine, or it can be stigmatizing. The word used doesn't really affect whether it's stigmatizing. If it's being used to insult/put me down, it's stigmatizing. If it's used descriptively it's not.
If I say to someone to "make way for the blind person walking there" I'm not attacking them, but trying to help them navigate a crowded area safely. That's true regardless of whether I referred to them as blind, unsighted, vision-impaired, differently-abled, or anything else. Similarly, If I were mocking them I'd be stigmatizing them regardless of the word I used for it.
If I say to someone to "make way for the blind person walking there" I'm not attacking them, but trying to help them navigate a crowded area safely. That's true regardless of whether I referred to them as blind, unsighted, vision-impaired, differently-abled, or anything else. Similarly, If I were mocking them I'd be stigmatizing them regardless of the word I used for it.