I wonder if the real problem is that we are really sick, and we just don't realize it: weight and eating too much processed food, so anything that improve these 2 aspects has also a lot of uncorrelated benefits.
Not saying the effort is the same just that its def not a decision to take lightly and just start doing thinking its a few shots and bam your down 50 lbs forever - still have to do the mental reprogramming to not eat the bad stuff and exercise regularly