There is a HUGE difference between talking about the average of any variable in a population, and talking about an “average individual” in a population.
I suspect that you have never met the “average American Family” which has 1.93 kids. Well, that is exactly the same as the "average UW student, and just as ridiculous to talk about.
Population averages tell you very little about any individual one happens to meet from that population. However, because people think that they do, it is possible to flimflam them with statistics. That is what is meant by “lies, damn lies, and statistics”.