How do the books factor weather, injuries, and fixes under your theory? If Peyton Manning is 50-50 yet large sums of money come in against the Colts, will the books hold the line because it's the right one in theory until the news is announced? If Manning is upgraded to probable, yet even more money comes in against Manning, then what do the books do? Books are trying to handicap humans in emotional situations with tons of other factors to consider with injuries and changing weather to consider. Therefore there will always be "moves" and the lines will float.
Back when Tim Donahey was fixing totals in the NBA you should have seen some of the shenanigans that were going on at books. Pinnacle would just get pounded on NBA totals and adjust the juice to try to entice the other side. Pinnacle was getting drowned with smart money, but they had the limits adjusted to those with info and then turned that info to even more money for themselves by adjusting the line and then betting the info at other books.
Information is the key and those who have it first will profit the most from it.