I don't understand why so many scoff at this notion. I work in finance and we commonly use the term "paralysis by analysis." Sometimes, you can handicap yourself by overdoing/analyzing certain things. RW played better yesterday, but he still looks off. And I don't think the OP is too far off with this idea because it really does look like RW is over thinking and not trusting what he sees like he was, for example, in the Saints game.
From personal experience (college baseball), anytime I was in a slump, it seemed like the harder I tried, the worse off I was because I got inside my own head. I'm not saying RW should skip practice, but maybe take a day or 2 away from the film room and just focus on footwork, etc.
Either way, it's not the end of the world and I trust RW as much as any QB in the league. But RW being a cerebral guy, I dont think the general sentiment of the OP is outlandish by any means.