Someone told me that it is useless to look good. How can I refute him?

The first thing depends on the context of your dispute. If it is peaceful, you can say this:

"It depends on whose face this so-called beauty is. If it is a hero like you, it is useless, or it grows on the face of a person like me who has no ability, it may be useful. "

If it's intense, you can say:

"Useful also useless. Just like happiness with money or happiness without money. People who have no money can be happy, and rich people are not necessarily happy, but I believe you always want to be a happy rich man? "