I think it's true that a majority of us do a significant fraction of our flying for work but I wouldn't say it's "basically everyone" here. There are certainly FlyerTalkers who travel primarily for leisure, including many who travel frequently for leisure.

As one data point, I think of myself primarily as a business traveler but I actually take a significant number of trips for leisure. Over the past 5 years I estimate that my flights have been 60% work-only, 30% leisure-only, and 10% mixed work and leisure. The figures for leisure would be much higher if I included car trips in excess of 200 miles each way, but as it is I'm only counting flights.