These things don't do diagnostics. They just give the user a heads up and suggest they see a specialist. The sky was already falling when they did that for atri

These things don't do diagnostics. They just give the user a heads up and suggest they see a specialist. The sky was already falling when they did that for atrial fibrillation, and there were lots of people claiming that it would submerge hospitals and doctors under a flow of false positive. The sky did not fall, hospital managed just fine (before COVID, that is), nobody's precious heart rate data were leaked, and a couple of lives were saved. These things gather metrics and suggest to see a doctor. They don't do anything like diagnostics, and they don't replace a doctor. It would just nudge someone to see a specialist, who would then diagnose according to their experience and the patient's symptoms. Noise is irrelevant here.