that you can produce good officers by other systems. there is much to be said in favor of the IDF's every officer has previously served in the ranks approach.
The American system as I suggested is driven by history and culture and its multiple commissioniing sources produces good officers for a very large military as OE and I argued. Most of the criticism I heard in the 70s and 80s was that our advanced officer education - CGSC (now ILE) and war college was of the MacDonalds variety. However, it looks a lot like its civilian counterpart Masters programs.

Cheers

JohnT