I totally agree with this, and sometimes it does help me. If I cannot find anything I think will be a strong image ill sometimes find something that is OK....seems like going through the motions sometimes helps me see. Granted I am more likely to do this with 4x5 than 8x10 due to costs.
It's kind of how i think I see differently when I have a capable camera with me. This is the reason I recently got back into the mamiya 7 system so I can carry a camera everyday, even when the goal is not photography. If I have a camera with me that I can make a decent enlargement with I tend to find more things to shoot, somehow doesn't work the same for me if I carry just the digital point n shoot.