It’s conclusions were more based on who and why. Specifically those who work or try to work as musicians as their job. The why, relating more to the way musicians are treated, valued and abused, creates a uniquely stressful environment. I believe the study did look at the broader case of musicians. Certainly the arts too attract people quite attuned to their feelings, expressing those feelings, and those who are particularly capable of empathy over sympathy.... all of which is further encouraged and developed.
Interesting, to me at least, is that once we have reached out to and developed such people, we don’t then teach them how to deal with those feelings in a way that keeps them safe and healthy.
Personally I think they should be teaching mindfulness to musicians. It is used for treating anxiety, depression and pain now, but there are also many studies that demonstrate increased performance at mental and physical tasks, and a far better emotional resilience. Not to be sniffed at.