I really disagree with this analysis.
The lower classes were added when younger riders needed a stepping stone to reach the next level.
The top route has increased in severity which has made the numbers willing/able to attempt it dramatically reduced.
I think doug is riding maybe only 90 % of when he was at his best, but certainly much much better than when he was 19.
The problem here is that too many,and gomez is the latest of a long line,gibert oliveras bethune morris connor and so on, are capable of the top route but have fallen by the wayside. i have no problem with the feeder classes this happens in many sports.
The fim need to find a way to keep those who can, in the sport at the top level.
The numbers are a side issue, 25/30 is plenty for a quality championship, 10 is not.