Why is gluttony such a bad thing?

Gluttony = careless : Food is deceptive, and so are all kinds of materialism. Do not look to food to give you joy or satisfaction. Restraint is a word which should describe our relationship to all physical pleasures, including eating.  gluttony is overeating simply to gorge. When you don't care about yourself or others and you overeat, you are engaged in gluttony. There are many references to gluttony in the bible.