Many items are more controversial than fly fishing justifies. It's a hobby and it should be fun, not provoke arguments. That's a nice sentiment, but not always true. Consider the question of whether the equipment or the lure designates fly fishing. What side you take determines your position on Czech nymphing and Tenkara. Is attractant a boon or a sin? How evil is a three fly rig? Should there be private waters? If you chased down all the issues, it would eventually bring you to Catch and Release.