I think one case where someone might object to your comments is the assertion that obesity is strictly a behavioral problem, in the form of overeating. While that may be strictly true by virtue of the conservation of matter and energy, the word "behavioral" can be interpreted as meaning "chosen," as in, "People are obese because they want to be obese." It may be helpful to note that there are many causes for behavior, including conscious effort, habit, addiction, autonomous instinct, reflex, and perhaps even lipopolysaccharide endotoxin.