It's probably accurate average-wise, but everyone here knows that airline captains, first officers, and flight engineers are three different jobs with three different payscales at each individual company, so lumping them together and averaging them out doesn't really mean much.
True, which can also be said for all of the other professions on that list. Take a look at lawyers, for example. We all know that although that may be the average, there are plenty of lawyers making $1 million per year in high-dollar law firms in major cities, while there are also plenty of lawyers working in public defender's offices making $50k. So in reality, the numbers don't tell much of a story at all.