Are hipsters more likely to buy Himalayan salt lamps because they’re hipsters? Or do Himalayan salt lamps make people more likely to turn into hipsters?
Seeing the correlation is easy; it’s harder to see which way the cause-effect runs.
Are tall people more likely to be rich because they’re tall? Or does being rich make people tall? Based on what we know about anatomy and how human beings grow, this one seems a little more obvious.
The point is you can’t make assumptions just based on correlations. You have to break the thing apart and find out how it ticks.