when a cartoon character sees a weird character they don't think there essentric or special they just think there a weirdo
When we see a weirdo we don't think there anything special we just think they have a mental illness
I've also noticed some real life people doing dumb stuff like cartoon characters
You are of course aware that everything you experience comes from the outside into your mind. If you see something artificial or natural, it still has to be observed with the same retina. There is existentialism philosophy, even resulting in works like that movie Matrix, arguing that we would not notice the difference between living and living in a sufficiently good simulation. Even without going so far, the critieria with what you judge situations and characters is basically the same, for fictional or for real characters. We even go so far as to attribute human qualities to animals or lifeless things.
But yeah, what you wrote is kinda trivial. People write stuff they know about, they know people, even weird people, so why are you surprised, that fictional people resemble real people in behaviour?
It breaks immersion if you write about characters doing weird things, but present it as normal. You need a fictional setting as well to do that, not a contemporary one. Than it is a plot device. Oh, look, the people in the future or on that fantasy world have weird customs, that is what shows, it is the future/fantasyland.
