How can he hold the photo lab responsible if he can’t prove they leaked it?
And every other service that deals with people’s copyrighted materials (photo copiers, framers, etc.). We’ve gone through this before. La-de-dah, it’ll all be so easy. Make the photo labs, copy shops, framing shops, printers, etc. deal with the whole convoluted, expensive, elaborate, ridiculous, legalize mess. Like they want to do that? Like that will be easy? Inexpensive? Seamless? Just like waving your magic wand, it’ll all be dealt with? Bullshit.
“Confidential”? Who specified “confidential”? Pretty slick little trick you tried there. He could be showing anything he has done, but does not want published for others’ profit or exploitation. This would be 99.9% of the photos he takes, as it would be for most people. He may trust his relatives, but if he cannot be assured that they’ll never let the plumber in the house, and if he cannot be assured that they will never show it to someone else who might not be so trustworthy, then he might as well not show anything to anyone.
At least in the world we live in now, there is a legal mechanism to stop people that behave in an untrustworthy manner. It may not always be worth the hassle, but it exists. You want that legal mechanism taken away completely. Also, in the world we live in, legitimate, mainstream publishers do not publish or distribute works unless they know they have proper permission. But in your world, once the work is “out there” anyone can publish anything. The automatic assumption is that it is all freeeee.
So there is no barrier of “Am I sure it’s okay to print this? Do we have the proper permissions”? It will be, “I found this, let’s print it.” It may or may not be “shared” by the plumber, but either way, the cat is out of the bag. All the lawsuits in the world, all the suing of the photo labs after the fact won’t change the fact that it has been distributed through mainstream channels. That is not the case today. You don’t see illicit copies of works for sale on Buy.com or Amazon.com. But in your perfect world, someone could see their (stolen) works available on Amazon, because the assumption is that if it’s out there, it is freeee! One needs a lawsuit to prove otherwise.
At least there is some barrier, and it can be a deterrent, and it can hold up in court ( as we have seen). You want that taken away, so that each time a person shares anything they’ve done with someone, they run the risk of seeing it for sale up on Amazon.com.