My guess is (1) Borell was a perfectly competent at training a good horse; (2) many other people, given the opportunity to train a good horse, would probably also do a good job at it, though some might screw it up; and (3) obviously whatever Borell's talents as a horsewoman, her conduct speaks for itself.
What did you say at the time after her claim of 10% of the B.C. winnings?