>most GPs are not terribly smart or insightful, tbh.  their job is to take corporate pharma output and get their patients to buy it, they are little more than drug salesmen with some background knowledge. 
I explained this to my wife. Most drs are just matching symptoms to drugs and don't actually know how they work. When a doc leaves the room and comes back ten minutes later with a recommendation, a lot of them spent that ten minutes on Google.