To be honest I am very keen on testing I believe that if something like that can be done and its accurate then no one can argue with it, no one can say oh its just this one pup because its genetic testing in majority. I absolutely hate all the cloak and dagger nonsense that goes on because people want to protect either their investment in a dog or their reputation.
Working breeders are slowly getting round to having their dogs tested there are some good breeders who see it as a benefit to both their future breed program and their current stock, sadly most still appear to have their heads in the sand giving out the impression that there is nothing wrong with working lines, well thats a crock of horse poo!! If you have a working dog if its not up to scratch has a health problem etc then it'll either be dumped, shot or rehomed worst case senerion used as breeding stock to churn out a replacement so they don't see the problems.. therefore they don't exist
Even if you aren't going to breed its worth doing the tests because someone else out there can benefit from the data and you might just find out something that will prepare you and your dog for its future if there is a problem - what is it they say prevention is better than cure, catching things early can only be a bonus.