I think there is some real truth in here that when we hold up a mirror to ourselves, if we're getting WLS we make poor food choices. I agree with Cassandra tho, organic food and healthful options (vegetarians, vegans, etc) can still lead people to being overweight if portions are out of control. Maybe you're including that within the poor choices - because chronic overeating is for sure a poor choice - but I don't think it's absolutely always the case that McDonald's is at the root of the problem - portion control can be the root issue as well.
(all that said, i don't mean to misrepresent myself. i love fries. i've just decided i love me and the idea of being around for a long time a lot more.)