Scuba--You have no idea what you are talking about. I guess your big problem is that someone used the FC restroom?? I actually don't think there is a FC restroom per se, just the one at the front of the plane, but I wouldn't know, as I am always back in cattle car. Walking down the aisle of the airplane is a whole different situation than the clusterf*ck which is arrivals at PJIA, plus security, immigration, etc, either at PJIA, or in Miami. Plus, just standing for long periods of time, especially in the heat, can be very painful. I can walk down the aisle of the plane without any help, certainly. And usually I don't request pre-boarding, but regardless, how in the world does that hurt YOU?? The answer is, no it doesn't, since you're in FC.
Tell you a little story--I recently flew to Indiana and since there wasn't any customs or immigration to be dealt with on either end, I stupidly did not book wheelchair service. By the time I arrived in Indiana and got in the car, I was in excruciating pain. The pain persists today, almost three weeks later. I spent most of the first two days in Indiana with my foot propped up with ice on it. I was in physical therapy before I went to Indiana and it continues now and the pain is at least as bad as it was before. Consider that little story before you start talking again about people who don't need wheelchair assist.