One thing it can teach you is to avoid putting that "problematic edge" there in the first place. A valuable skill in nurbs modeling.

With regard to the mamoths who can just "eat through" fillets like theres no tomorrow, that can be a "bad habit" also. So in a "manufacturing arena" the gobbled up area can be ARBITRARY and even DIFFERENT with various packages. Not a good thing when trying to design precise things.

With that said, one needs to recognize the "advanced fillet" moi fails at, and the "fillet at all costs" solutions.