Beauty and glamour are not the same thing. Maybe Rockwell was bemoaning the fact that our ballerinas do not leave the theater dressed in eveningwear and big jewels? But we have no lack of glamour on stage. Lack of mystique possibly, but that's not glamour.
And regarding inner beauty, see printscess' little tribute to Peter Boal and ViolinConcerto's reply on another thread from yesterday. Printscess speaks of qualities that we inferred from Boal's performing persona.
Anyone who has (and has had) the honor to be taught by Peter Boal, will have been taught by a caring, gentle man who is a true artist. He values the talents and feelings of his students. PNB is lucky to have him. SAB and NYCB lost a wonderful talent and a wonderful human being.