No way, no how
If he were right, my teaching ratings would be better. Daniel Hamermesh and Amy Parker have established that "Instructors who are viewed as better looking receive higher instructional ratings." To make matters worse (for me), the impact "is larger for male than for female instructors."
With Harvard's endowment, you'd think it could get me to write the lectures and Mr Bloom to give them. That seems the optimal division of labor.