How to annoy music learners with one sentence?

People who study all kinds of musical instruments and vocal music theories don't like being asked why the guitar is so small or especially Creary when learning the violin. People always ask me how many grades I have, and then I think I'm rubbish when I say I can't pass the exam. What I want to say here is that piano players and accompanists are different and incomparable. I also said that people who have played the piano for ten years don't know how to use it. Learn vocal music. People always say that I can't sing well ... Well, it's true ... Guzheng, guitar, ukulele, drums and other musical instruments. It is rarely studied. Naturally, no one evaluates them.