The assets valued in economics allow me to make a judgement on how an economist is likely to view , say , dieting.

With that judgement in-mind, I may be more likely to follow the instruction or believe the idea the economist is saying rather than someone else like a drug-addled rockstar or an HIV infected addict.

The information the economist espouses, however, will surely be thought of at a lower priority than any information accrued from a medical doctor, dietician, or fitness instructor.

Considering the opinions of 'non-experts' does not raise flags for me, at least.