Me:
but it's not entirely fair or complete to say that your (obviously feigned) beliefs are probably wrong. Santa Claus may exist, but just not in the literal or physical sense in which we depict him. The common depiction/concept is just a metaphor. We don't realize this, but the concept is popular in part because of what we unconsciously, or perhaps consciously but non-analytically or unexaminedly or non-conceptually, recognize. There are many things we know but don't know that we know, and the popularity of memes, as in viral ideas (such as Santa Claus), depends on the entirety of the human mind, including what we don't know we know, probably through aesthetics, which are themselves based on truths we don't understand, (which is why the field of aesthetics is poorly understood/explained; beauty is embodied wisdom), rather than just on conscious and analytical or left-brained thinking like most human constructs.

So, on to what Santa actually represents. Someone very wise I know said some things about this, but I don't remember what. I think it related to the excited, elevated, loving, generous, electric feeling you get at Christmas time (or that we did as children, at least in some families and cultures). But there was more to it than that. Perhaps it could more specifically represent the spirit of giving, but what do the flying, coming down the chimney, etc. represent? Probably something. Well, the flying is obvious. When we free ourselves from our devastating cultural cognitive entrapments, we do something metaphorically like flying, and naturally we also feel all the ecstatic feelings of Christmas, and love each other more which would make us more giving. Because those things are our natural state, not what we're afflicted with by the world. And coming down the chimney probably represents some higher aspect of us (the part that's responsible for the love, the ecstatic feeling, the freedom, etc.) being funneled down into the ego or conscious mind or physical body so we can experience it better.

Jim Carrey also had some interesting ideas here: https://www.youtube.com/watch?v=-9M0snom4AA . It may sound crazy, but it's only crazy to those who aren't open-minded to new ways of thinking and don't already have an understanding of how much things are really interconnected, especially when it comes to the subtle meanings behind memetic ideas.

And some people even think abstract or symbolic figures such as Santa Claus are literally real things in the world, they're just not visible, or maybe they are when they're instantiated by some physical representation of them like a Santa working at a mall. Perhaps they're normally nonphysical, or perhaps they refer to true states about the world that exist in a distributed sense as all the things people do with and believe about the respective symbols. It's a bit odd of a view, but it's not necessarily logically invalid.

So, one way or another, Santa Claus may be more of a real thing than you think. Beliefs aren't so easy or black and white.