In my experience, doctors have widely-varying, fact-free opinions that are often wrong on wearables' personal quant and consumer medical devices' precision & ac

In my experience, doctors have widely-varying, fact-free opinions that are often wrong on wearables' personal quant and consumer medical devices' precision & accuracy. Heck, some are even wrong on home-medical equipment. The reasons are medical school drills into them two things 1) only doctors and specialists can be "right" 2) everything else is wrong. This creates an opinion based on narcissism and elitism, rather than data. Take a FitBit Charge HR 2. The one I have is consistently within 2-5% of hospital & doctor office pulse readings. That doesn't mean it's perfect in all circumstances, but that it's observations haven't been discredited with evidence and there's little/no counterexamples to show that a device I wear is somehow "inaccurate." Another doctor claimed home blood pressure cuffs, products strictly-regulated by the FDA, are "widely inaccurate." This also seems binary-thinking FUD and wrong, because, anecdotally, I checked repeatedly and have an accurate consumer blood-pressure meter. This is what happens when a profession encourages people to invest their egos in a preordained outcome.