Hi! I have a question! I've heard it's rude to use "why" for a person who is not close to or meeting first time. For example, "Why did you come to Japan?" And I've seen it's same means 'how come" , "what for", " to what end", "what's the purpose" and "for what reason", "what made" and" what brought". I have no idea which is correct to use and casual, difference nuance and why is "why" rude and When "why" isn't rude. So could you teach me in detail? 🥺