It's the kind of humor that's funny because there's a shared understanding. You can't explain why 6-7 is/was funny to gen alpha, it just is funny to a certain group of people that all grew up at the same time in the same zeitgeist.
Recognizing something as funny or not helps solidify your identity in a peer group and the identity of others outside of the peer group. At least that's how it seems to my lay person understanding.
Same with Aqua Teen Hunger Force, you can't really explain what makes it funny, because it is so subtle. But to the right age group who grew up with the right background, it just hits in a certain way.
Is really your heart though or your mind? Asking for a friend.