> Predicting an emergency based on observed biometrics would be incredibly useful to many of them and these sorts of dismissals are exactly why the digital privacy movement has increasingly lost steam with regular people.
Nothing about predicting an emergency is incompatible with privacy. It could be done by your own device under your own control without disclosing the data to any third party. The only necessary third party communication would be the call for help, which itself would only happen in an emergency and not under normal conditions.
But that isn't how these things are implemented. Instead they typically upload your sensitive personal information to a corporation, which not only has no benefit to you, it commonly gets used against you as they use it to influence your behavior in ways that increase their profits (i.e. increase your costs).
Having a high resolution radio thing which is completely under your control can be an interesting feature. Having a high resolution radio thing which is in your living space but under someone else's control is an outrageous privacy violation that most people would strongly object to if they understood the implications. Which makes it little surprise that the purveyors prefer that people not understand the implications.