So if you had a good conductor and stuck him in front of a full orchestra, but the musicians had only played at introductory level, do you think he could get them to churn out a masterpiece??
Isn't his point that whether or not the conductor was tone deaf or brilliant at his job, can he simply by waving his arms around make Barry on the trombone sound any better if Barry doesn't know how to play a trombone?
If the conductor’s previous orchestras were based in the Azerbaijani woodwind division then there would be no guarantee he was any good to begin with - even if he once was assistant conductor to Tchaikovsky.