I live a couple hours from banff, most of my hiking is in that corridor of the rocky mountains. Using "leave no trace" and "banff national park" in the same sentence is a bit of a joke. The article mentioned the amount of traffic through there but it failed to mention that "back country camping" in banff, Jasper, kananaskis, includes picnic tables, steel fire rings and split firewood. Luxuries like that are magnets for idiots who pack in glass 60 pounders of crown royal and love to cut trees down despite the firewood. Leave no trace is a wonderful catch phrase for parks Canada to drop to appease greenpeace, but it doesn't really exist in those places.
If they did this study in the actual bush, real wild places which Alberta/BC has an abundance of, this might all mean something.