I fully agree that experienced hunters do not "need" a guide. But the requirement for non-residents to have a guide to hunt in some states and provinces is often not driven by logic. As an example, a number of years ago, after 21 years of trying, I drew a Wyoming bighorn sheep tag in a wilderness area that the state required non-residents to hire a guide in order to hunt.
However a non-resident that wanted to hike, mountain bike, go camping, fish, hunt mushrooms, etc. could use the same wilderness area with no requirements for using a guide regardless of his experience.