Less than 1% of obesity is due solely to somatic pathology (usually endocrinopathies).
Less than 1% of obesity is due solely to genetics.
Hence greater than 98% of obese patients have behavioral/psychological roots to their obesity.
About 50-60% of obesity is associated with genetic tendencies, but it remains that that proper diet and exercise behavior can overcome the tendency.
Hence, >98% of fatties have themselves to blame.