I think that the deluge of images that confront us every day already devalues the individual image. I was browsing Scott Kelby's website the other day, and he had a heap of American NRL football photos. Excellent shots taken by a skilled photographer. However, I spent perhaps 5 seconds on them, then onto the next thing. How much are those images really worth? I'd argue "not much", judging by the amount of eyeball time they get. I'd say the same applies to Zack's band photography - a passing glance at best.
Some magazines - say National Geographic - need excellent shots, otherwise the brand is devalued. Others, and the mainstream broadsheet newspapers fit here, don't really need a) many photos or b) particularly high quality ones. Yeah, sure there are 'iconic' photos that pop up once in a blue moon, but if you read about the bloke who captured the shooting of Lee Harvey Oswald, and the one who missed out, there is a heap of luck and really not a lot of quality (not to take away from the skills of the photographers involved). These days, some bystander with an iPhone could be the one who got lucky in the same situation.
How many looks do any photos from the average AP member get? Even the good ones who win POTW/POTM? Care to monetise that? How much could Rick charge for each viewing of these photos? My bet is nothing, because even if they are great photos, we still just glance and move on. And yet we all get upset about "I'm not going to give away copyright because it is my art" (when in fact it is "sell copyright" because someone is already paying the photographer in the case of professional photography. The chances of 99.9% of these images actually getting more than 100 views ever is 0 (regardless of quality, usage, payment, watermarks, skill, promotion, websites, whatever).
I think the sooner that professional still photographers accept that in the main that they are being paid an hourly rate for their skill in manipulating a camera, and get away from the view that they are the next undiscovered Annie Liebovitz, the better off the whole industry will be. (ie Join the real world of working for a living.) This will marginalise the cheap operators, because then the average consumer will be able to recognise that if they want a quality job, they need to pay more than they pay their gardener, and it will focus the minds of the would-be pro on the choices he has to make - how many hours he does, what he gets paid per hour and why he is doing that rather than mowing lawns.