Apart from the fact there were a number of GT Academy finalists there, you seriously think that more didn't make it because they are only good at hotlapping?
It's incredibly arrogant of you to describe yourself as a "racer" implying that former GT Academy guys aren't. The reality the people who have qualified for GT Academy events in the past are equally fast racers as hoplappers and the reason there aren't many of them around is that a lot don't even play the game any more and quite a lot of those that do don't play it that much.
At the end of the day the top drivers in the game are always top no matter whether they're doing a time trial or a race, and it really does make me angry that you try and put yourself above people who have been top players in the game in the past because you qualified through a system based more on racing than time trials. You're not better than them, you just happen to play the game now.
(I won't get into how using DR alone probably isn't the best way of finding the top 30 drivers considering that there are probably 100s of drivers capable of getting to the maximum level given time, but it does a pretty good job, just as a time trial would)