Mike, agree with your sentiment but the appropriate decision will be made by considering both Quantifiable and Qualifyable factors. It maybe that the opinion is the phycological advantage of playing Glen may out weigh the physical disadvantages.
It all started with the unwritten Manly policy of only employing ex-manly players as coach.
I can only think of 2 non-manly coaches since 1963, (Lowe and sharp) and only about 5 in total since 1947.
This is the beginning of the "culture"