Average is also a word used outside the context of mathematics. Would you make this argument if someone said "I'm average looking"? No, no, you can't be average looking, because there is no such thing as an average of appearances! Come on.

average as in typical or usual to what? what’s the data set?

The data set is the training set of the LLM. Look I get that you are obviously very against AI, and that's fine, I don't really care, but what they do is what I've described. It's not a literal average, no, but its comparable. That is all I have been trying to say.