I think the big concern isn't so much "could it harm you today." It's that these things can mutate over time. The worry is that enough human consumption over time could eventually lead to a mutation/strain that can infect humans. Personally, if I ever had this situation I think I'd keep the meat but just make sure it was all thoroughly cooked. Nothing coming out of a stew pot after 8 hours is going to be a problem.
Actually I'm a little confused by the current testing strategy. The thing is, (almost) none of us pack out the entire animal. That spinal cord is staying in the field CWD or not, and I haven't heard of any plans to go retrieve them by hunters or CPW. And we have these stories of game cameras showing that deer at least do eat off carcasses from kills - they aren't 100% herbivores. I'm not a rocket scientist but that seems like the bigger danger. You have this CWD-positive animal... and it's just an entry in a database?