I can turn around and say that treating 99% of fat people as lazy slobs is the same kind of generalization that leads to security theater when we assume everyone is a threat to our national security.
What's the difference between your and my asinine analogies? Yours pushes to look at people in a more judgmental and critical way because you're almost certain they sit towards the meaty middle of the "bell curve" (bell curve of what exactly?). Mine pushes to treat everyone with a higher level of empathy and acceptance. Could an overweight person just be lazy? Sure! Could it be due to more than that? Certainly!
In fact, the type of shitty and ignorant comments this article talks about are most certainly fueled by the idea that most fat people are lazy victim-card playing slobs. Turns out it was a little more complicated for her.