Because then your bread turns out looking retarded! I was rushing when scoring this baguette and therefore got uneven openings(and a non-opening middle). Still, it was delicious. Much better than store bought. You can see the holes could have been lovely : /
Really, I can't say enough about Hamelman's book "Bread" because so far everything I've made from the book has been successful and tasty. The pizza from a few posts ago was his dough recipe and is my favorite one thus far. That's all for now, happy eating!