From oober:

"He just lost his starting center, and his WR group (already, arguably, the weakest group on the roster) is banged up. I can understand hesitancy to throw starters out there in games that don't matter."

I agree that the score of the game doesn't matter...but using the game to actually get ready for the season matters a great deal...especially with a new starting QB (who is actually a backup), a new #1 WR (who's actually a #2) and a bunch of developmental WRs AND now a new starting Center.

The leadership of the HC is fair game for criticism...he is the one making this decision...just like the FO should be criticized for not properly vetting their new QB and all-but-ignoring the glaring hole at WR that has existed for waaaaay too long now.