Because the general public can't commit to the sacrifice or stomach what we do in the air on a day-to-day basis. Imagine grandma pooing herself because a 109 is drilling straight at her 12 o clock level and her canopy is riddled with holes as it just misses her. Actually, grandma is pretty tough, and I think she used to shoot down 109's back in the day...but anyway...you get what I'm saying.
All jokes aside, they should put it in the Intense category instead of moderate or comfortable...