There is a question as to whether this is a real disorder. Eating healthy and convincing others to do so isn't a sin.
https://nutritionfacts.org/video/is-orthorexia-a-real-eating...
https://nutritionfacts.org/video/is-orthorexia-a-real-eating...
These people are not eating healthily, they have an obsession with "healthy" food that interfere with their day to day life and causes harm or distress.
That harm may be from something like REDS (Anna Boniface has written useful stuff about that), or it may be over-training or food restrictions.
https://www.mayoclinic.org/diseases-conditions/personality-d...
https://www.crisiscareconcordat.org.uk/inspiration/meeting-t...
I think you've been unfairly downvoted. I don't think you're saying "people who have this label are annoying", I think you're saying "health care professionals who struggle with a patient are likely to say it's the patient's fault, because that patient has a PD".
Ah, so they would be better off eating junk food? That's actually what the authors of the studies suggest.