You're right, everyone shouldn't be able to attain six paths. However, the problem arises when the devs made it mandatory in order to receive anything other than the base rewards from arena. The system is essentially "broken" when 90%+ of your playerbase is relegated to get jack all from arena, and gives no incentives to continue partaking. As an example, I got up to Anbu before I started to see a slowdown in my progression. Speaking with the top bp from my server they're all stuck in kage. If they're having difficulties advancing I know my chances are pretty much nil and leaves me with zero reason to continue ranked arena. Doing away with that one stipulation would not only ingratiate the devs to their playerbase but I believe it would also encourage people to continue with arena trying to push to the next level.