But we don't live in a perfect world, we live in a world where if you tell people 'You must do 'A' before you do 'B'.nobody does A.
Heck, in perfect system where only what needed to be added was sent our downloads for patches and fixes would be 1/100 th the size all teh time.
Its an update, there is likely enormous amounts of replication and redundancy with most updates for most games. I'm sure it saves them from having to diagnose what each individual person issues is - who HAS or HASN'T downloaded what.
