Good points edgt.
Quixotic stuff from Blake.
Benching riders who ride more than 40 winners before they reach 18? By that rationale Jack Kennedy would be sitting on the sidelines now instead of riding grade 1 winners for Gordon Elliott. So instead of making a name for himself he would be slipping out of the subconscious of trainers not on account of injury or any lack of ability, but by some crazy ruling.
If Fergie had adopted such a policy with Rooney, we wouldn't now be talking about him breaking Sir Bobby's record.
Being a jockey, no different to any other sportsman, is a highly attritional process where only a small percentage of talented claimers will be both good and fortunate enough to make a living at the game once their claim is no more.