Its not a negative test, so even if they don't detect prions, there's no assurance that your deer doesn't still have CWD.
As to the study in Canada on the monkeys being quoted all the time, I think its a horse shit study myself. If it isn't up for peer review and its not going to replicated, then its crap.
Since cwd has been around since at least the late 60's, I would find it hard to believe that nobody has contracted CWD in that time frame if it were jumping to humans. I wouldn't want to guess the number of deer, elk, etc. that have been consumed by humans around Fort Collins/Laramie/Casper area, but surely in the thousands. Not a single case of CWD jumping to humans.
I still think it makes sense to proceed with caution, no doubt it impacts wildlife in a negative way, but I think there's a lot of sky is falling propaganda out there in regard to CWD.
One that comes to mind is projections and models predicting the extinction of elk, deer in areas with CWD...purely speculation and is being proven wrong.
Study first, remain neutral in the outcomes, and quit with the speculation...would do more to help than "scientists" breaking their legs jumping to conclusions.