I think this is very much an "it depends" thing - a lot [not all] of "caused by obesity" issues are really caused by behaviour that also results in obesity - I

I think this is very much an "it depends" thing - a lot [not all] of "caused by obesity" issues are really caused by behaviour that also results in obesity - I think that would be comorbidity? but I am not a doctor :D That said I agree that something like this, assuming results hold, no drawbacks, etc could be very valuable, if nothing else just for increasing quality of life. But I could see that losing an initial chunk of weight also helping on the road to exercise (if you are extremely overweight exercise may not be an option).