What Starjun meant by that is for people outside the top 100. Even though their not in the top 100, their still good chefs if their skill is acknowledged. If the ranking is meaningless, why bother even having it in the first place besides showing how much better Komatsu is compared to everyone else? Especially when Setsuno survived for over hundreds of years and is strong enough to survive by herself in the Gourmet world? Yea no.
Also I don't recall Starjun saying that, I only remember "Mahmai" saying that exact line.
And no, dumb rules that go against cooking are dumb. It is not possible for food to take that long. No matter where or what setting it is.