It's a privacy invasion scam. At a previous employer they wanted to track our steps and our GPS location and also wanted us to record every glass of water we drink. It's a disgusting ruse. I don't care if they were going to give me $300/yr, my privacy is worth more than that.
Should car insurance companies treat a 16 year old with a WRX and a 45 year old with a Camry as equivalent?
It's really pretty bizarre that we expect people to underwrite our health without any insight into what risks we choose to take with it.
We chose the free market as our approach to health insurance, we could at least make it efficient. Right now a lot of healthy, fit people are paying through the nose to subsidize the privacy of those with sedentary lifestyles.