As someone who has had basic physiotherapy before I can tell you that you do need some level of "compatibility" with the staff. Some will understand your body and limits better than. Others. I imagine that for professionals who need it constantly to be in top shape, that compatibility should be really important. On top of that they also mention that Kim Dan was really organised, did a lot of outside work and research to align with his patient/client.
I think that from the managers perspective since kin dan was one of the only PT theyve hired that has lasted as much as he did, so maybe he thought that meant that he was a very talented PT and excelled in his job and thats also why jaekyung kept him for a long time. Or maybe its because kim dan put in so much effort and sometimes spent sleepless nights in order to make sure jaekyungs health is superb, even if he isnt the best PT out there, i think his hardworking nature make him seem like the perfect fit for jaekyung (smn who keeps track of everything and anything jaekyung does)
Can someone explain this line to me? Maybe I missed this somewhere in the manga, but can someone explain what would have made Dan special? Not saying he's a bad PT or anything, but it seems like it wouldn't be that hard to just find another good PT.