There is no average Steam user.

People are not vectors of real-valued numbers, and "mean person" is not a coherent concept. Does the average person have half a penis and half a vagina? Is their skin a tan-ish mocha brown? Do they have slightly but not really curly hair that is long in some parts and short in others? Incomplete epicanthic folds?

Any representation of people will be a randomly chosen sample, and not an attempt to visualize the blending of all people from the sample.