Maybe. It's clear to you that you have found a correlation. Have you explored many other causes to see what their impact might be? When you are pulled over, what is commonly the reason/excuse the officers give? How do your driving habits compare to your wife? Do you drive at similar times of day? Are you both really cautious drivers?

When I was a kid I was always told that it was the people in fancy sports cars that got pulled over all the time, so by driving a modest cheap car you were taking yourself off the radar.

But that's the problem with anecdotal experience. It's hard to extrapolate trends without proper science and analysis.

EDIT: I didn't mean to target this only at the parent. The article suffers a lot of the same issues. They base a large part of their argument over a single statistic (amount of people being pulled over vs. race) and then fail to dive any deeper into the data.