That's not a "problem" with the study, that's the entire point. The entire point is that stress isn't the issue, it's perceiving stress to be a bad thing that i

That's not a "problem" with the study, that's the entire point. The entire point is that stress isn't the issue, it's perceiving stress to be a bad thing that is bad for your health. It's not talking about "good stress" or "bad stress".