Keep in mind that Louie isn't taking care of his 'Beetus properly. He's still eating garbage, still drinking fizzy sugar drinks, and still sits around on his ass all day, everyday, and he's getting fatter. Diabetes can be a pretty quick killer if the person who has it doesn't take it seriously and change their life accordingly. Louie wouldn't be the first Diabetic to croak before 50 because they didn't take it seriously. And that's not even taking into account the other health problems that come from being 500lbs.
There usually are noise ordinances for residential areas. Usually they don't take effect until 10pm or 11pm because people are allowed to enjoy their home time in their own private property however the fuck they want. No one gives a fuck that the Gagliardis have a new cat. The old farts in the neighborhood probably can't hear the loud music anyways because they're old and deaf. And Louie is basically just a squatter in his mother's house who doesn't pay rent and doesn't contribute to taxes, so why should anyone give Shit One about what some fat, lazy, jobless, nobody male Karen like him thinks?