We still don't have price transparency, so it's not surprising the customers of health don't shop around.

I went to a grocery store health clinic without insurance and asked how much it would cost to see the doctor.

They were surprised I asked how much it cost, since they just assumed my insurance would pay for it. After insisting, I finally was able to get them to look it up. They told me it would be $100, but during my exit (and payment) they increased the price to around $200 based on my diagnosis. I asked why it should cost me more money for the doctor to diagnose me with something else, when the doctor didn't do any other special tests (e.g. I wasn't paying for a medical test), and they said "That's just the way it works."