Because that's what people do when they have a political/social satire talk show. They rant about shit. He's been doing this schtick for over 2 decades now, in addition to his stand-up, which he also does regularly. People are buying what he's selling. His formula works. It has mass appeal. His audience is full of woke lefties who agree with him on 75% of the issues and he refuses to pander to them in order to align with them on the other 25%. And, proving what he says about how butthurt and thin-skinned the woke is, he gets roasted whenever he dares to have an opinion that isn't "correct" (which, of course, has always been his schtick) He rants against the morbid obesity and unhealthy lifestyles of a large segment of the American population and the woke get offended and say he's "fat shaming". But everything he says on the subject is 100% accurate. Obesity is the biggest health problem in the United States that no one dares talk about because the woke has decided that fat should be celebrated instead of criticized, even if it's not healthy. Maher makes a living from pointing out hypocrisy like this, and saying things that others think but dare not say.