I think that Winogrand had an obsession, or even an addiction for taking photos - I would say it was on an emotional level for sure.
I actually think that the idea does have merit - if someone offered you a roll of exposed by not developed film that was taken by a master, would you buy it? I have to admit, it would be tempting. THe hardest part would be making sure that its authentic (just like the bits of the Cross that have been sold all over the world!)
If you assembled all the bits of the True Cross in all the churches in the world, Jesus would have had to be 14 feet tall with a 15 foot armspan.