Yeah, you know, I've only been watching the Spurs closely for something like the last 30 years. I'd defy you to find me a quote by Popovich saying that Manu comes off the bench to stave off foul troubles.
Manu's foul against Dirk would have happened whether Manu started that game or came off the bench. It's not as if Manu wouldn't have been playing in the closing seconds of regulation if he had come off the bench that night.
In fact, during last year's NBA Finals here's exactly what Pop said about why Manu comes off the bench:
http://www.nba.com/nba_news/ginobili....html?rss=true
Now, I wonder which of these will be your response -- will it be:
(1) Popovich doesn't really understand why he's bringing Ginobili off the bench; or
(2) Popovich is lying; or
(3) Popovich has reasons for bringing Ginobili off the bench that he's only explained to you and that he then systematically lies to the media about those reasons.