The term “neurodivergent” implies that there’s nothing wrong with you if you have ADHD–you’re just special and different.
I think that's definitely something you've inferred but is not necessary implied.
For me, it perfectly describes a wide range of neurodivergent conditions such as ADHD, ASD, Dyslexia, Dyspraxia, et al. It describes a threshold that makes those different from neuro-diversity to where that person has a disorder that impacts their daily life.
Conversely, I feel that the term 'neurotypical' implies that theres nothing wrong with that person when those who are NT, tend to not say what they mean, talk in riddles and hold some very strange assumed opinions about things as well as considering themselves to be normative, very much to the detriment of those they think are outside the parameters they set in their minds.
“Mental illness” is really the only other option
That would imply there is a cure, which there absolutely is not, and that there is a normative 'well' condition.