I briefly tried doing idea extraction on the dietician market.

My cousin was a dietician so she gave me a wonderful session. (I still have the notes.) She also referred me to a fellow dietician. That session did not go so well.

Very small sample size, but it seems there is a correlation between dieticians and a personality type that is not the easiest (for me) to talk with. Either certain personality types are driven to become dieticians, or the arduous journey to become a dietician filters/forms this personality. Not sure about other fields...

I decided to switch niches when I discovered how complex it would be to follow HIPAA regulations.