People are usually interested in, and often even moved by, anecdotes about individuals, whereas they rarely even pay attention to statistical information, much less change their beliefs in response to it.
Given that ...
People are interested in anecdotes but not interested in statistical information.
and that ...
Anecdotes are generally misleading.
Why is it that ...
People still seem to have fairly accurate beliefs about society?
Goal
We need an answer to help us understand where people are getting their accurate beliefs about society.
They don't seem to get them from statistical information, because they rarely pay attention to it.
And they don't get their accurate beliefs from the anecdotes they love, because anecdotes are usually misleading atypical cases.