Did you read the article?
We can likely blame lobbyists for the tragedy that we'll never figure it out because of special interest money in keeping the "someone/something" in the dark.
But does it really make sense to say obesity is someone's 'fault'? Choices have consequences, but fault requires unambiguous harm.
And in general, society's attempt to make things "no fault" seem to always result in more of whatever it is, not less.
Would I love to blame my body fat on anything else? Sure! But in the end it's down to me. Maybe it's harder for me or easier for me, but it's still me.