Seattle - SF: odds and wishful thinking

Too busy to write much these days, but I came across something so fascinating that I couldn't pass it up.  While looking all around for odds, I noticed that those who pick San Francisco to win in Seattle, do so by at most 4 points; those who pick Seattle to win, vary between 3 and 11 points.  The betting spreads give a 3 ~ 4 point nod to Seattle, with most people believing that Seattle will cover.

No one picks SF to win in a blowout; many people pick Seattle to win in a blowout.  The signal seems to me to be that people are using wishful thinking to project a means for SF to win, while those who predict Seattle to win big are expecting more of the same (see SF @ Seattle the last three years).  Confidence gives people the room to make blowout predictions; low confidence gives people a reason to hedge their prediction by picking a low number -- a prediction at a toss up, really.

In any given game, particularly in a playoff where the best of the best are playing each other, every team has decent enough odds to win, so it's not impossible for SF to win.   But I can't see how SF would win.  Seattle's lone loss in two years at Century Link Field, was a fairly meaningless game against a team -- Arizona -- who had a fighting chance to displace SF's spot in the playoffs.

Seattle 27 - SF 10

Which is to say, I think Seattle wins a Super Bowl this year.

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Added: FWIW, of the four teams today, New England has been flying under the radar almost all season long, with Denver, SF and Seattle all taking turns in the limelight.  They registered a blowout win against Indy in the playoffs, but also blew out the Ravens in Baltimore, the second to last game of the regular season.  So if you pick SF to win in Seattle, wouldn't you pick NE to win in Denver?