Sure. OK. How about we put the Greek alphabet at the lower code points and the Latin alphabet higher up, and now you might argue that Latin takes up more space than necessary.

Potential counterpoint: "This is stupid. Latin goes in the lower code points, it always has, it always will. Who's putting Greek down there??"

Well, if Greece had invented computing as well as, let's say, democracy that's very likely how things would be.

In that timeline, someone is using exactly the same line on you "[The representation of Latin text in memory i]s as long as it needs to be unique." and you're annoyed because your short letter to Grandma is using far too much space on your hard drive.