With regards to the worth of the gadget... Is it better to be slightly more physically healthy but have less privacy, or retain privacy but miss the potential

With regards to the worth of the gadget... Is it better to be slightly more physically healthy but have less privacy, or retain privacy but miss the potential benefit? This is a question for present age. You'd think that knowing the amount of steps you do etc in a day would certainly be your information for one's own eyes only, but no - corporations are heavily involved.