Remember the Chicken Boo bits on Animaniacs? Wasn’t that just a humorous externalization of the imposter syndrome? Think about it, part of the theme went “You wear a disguise to look like human guys, but you’re not a man, you’re a Chicken Boo.”
The main plot revolved around that, Chicken Boo dressing up as something and being successful (though he just seems to be standing there, not actually doing anything or even fully sentient perhaps), only to be exposed as just a chicken at the end of each segment. Each and every time. Isn’t that what we’re all worried about, that we wear a disguise to look like human guys, but we’re not a man, we’re a “Chicken Boo.”
It might have been funny and a seemingly endless formulaic repetition on a gag theme, but that’s the imposter syndrome all over. It worries us. It’s more than just an odd gag.