Sometimes I wonder if people changing filters so much are actually cutting them open to check their condition and see if anything is really in there. In terms of lube system function and oil breakdown, even the best full flow filters are nothing more than a coarse strainer in a healthy engine.
Peace of mind is great, but it gets to be bit obsessive compulsive, at some point. It's almost something like stopping at every other gas station putting 5 more gallons in just to have the "peace of mind" you'll never run out of gas.
OTOH, keeping that demand high is probably good for the economy and holds prices up to where the oil filter factories can make a good profit.