That was a quote from the site, not my own comments.
I agree that we should all be trying our best to prevent the spread of all invasive species.
Sadly however I believe that when things like this spread it's by people who've never even heard of whiling disease.
Hikers, boaters, kids, dogs, ducks and geese... river users come in all forms and not just fishermen.
That's not to say that you should just say eff it and ignore the problem. Or that just because it's in one part of the river that all parts are affected. It's known to affect hatchlings more easily and so some tribs that are free of the disease can spawn healthy fish in watersheds that are deemed as infected.