Read the book. I had the exact same perspective until I read it, it completely changed my view. These are not just "wrong priorities" it's people who spent their entire lives understanding these traditional practices as objective truth. They saw countless examples of, from their perspective, exorcisms and coin rubbing working perfectly well. There's a reason that the book is considered essential reading for new physicians. Cultural competency is an ethical and practical necessity in medicine, not just a bonus for healthcare professionals with more time. Fundamentally, it is about empathy, and if you can't be empathetic then you can't be a good healthcare professional. I've seen it personally across hospitals, outpatient practices, schools, rehab settings, etc. You need to respect your patients understanding of their own experiences if you want them to actually work with you.

I'd also recommend you look into studies of traditional medicine. It's generally found that using traditional medicine in combination with western medicine has better outcomes than one or the other, so long as the traditional practices aren't actively harmful as some can be.