I guess I was focusing on the most obvious cases. If a pill makes everyone skinny you'll notice much more that there's no more huge people than that skinny peop

I guess I was focusing on the most obvious cases. If a pill makes everyone skinny you'll notice much more that there's no more huge people than that skinny people's body fat went from an average of 13% to 11% or some such. I do agree the motivated have more likelihood to improve, but on a societal level I tend to think first of raising the bottom of the group. I agree with your points.