That is a fair point. In the United States, people used to make "apple jack" out of apple cider that way. It's essentially freeze distillation. But be warned

That is a fair point. In the United States, people used to make "apple jack" out of apple cider that way. It's essentially freeze distillation. But be warned! Don't do this, because it concentrates the methanol and other conjoiners. Remember, distillation bad, brewing good... unless you really know what you're doing and are legally allowed to do it...