It's hard to improve when you're never playing against the best. It would also be harder to justify spending much money on a national junior level if there was no incentive to ever compete with them.Why not? If Germany was so good, Germany could have qualified to top 6 by winning the lower division, and then could have done the same thing vs Finland, right?
With this same logic wouldn't it be the best to just have Women's world championships be just USA vs Canada best of 7 since no one else will probably ever win? Hockey is more than just the eventual champion.