Opinion only. Fat does not equal funny.
Mellissa McCarthy is right there as well. Just because you are fat and unafraid to make an ass out of yourself does not mean you are actually funny.
If you enjoy slapstick and love watching someone be horrifying and completely oblivious to how they act in social situations, keep on keeping on.
Rebels entire performance at that awards show was just a combo of 'look how ridiculous I look in clothes only skinny people should wear' and 'wow, listen to the crazy things I say with the hole I usually only use for eating'.
I'm not saying fat is not beautiful, I'm not saying she needs to lose weight, I'm just saying that you're riding on the coattails of equal opportunity by getting hired because you're fat and studios will look like they don't discriminate.