it might be still impossible for others. tell a blind person to just look out for cars. tell a person with paralyzed legs to just get up and walk. tell a type 1 diabetic to just skip insulin.

obesity has a large hereditary component. important genes associated with obesity are expressed in the brain.

is it impossible to live with constant hunger and its consequences? no, likely not, but it's not really a big mystery why millions of people fail to do so.