Why do people respond to letters from lawyers? I thought it was common sense to have your own lawyer respond. It’s like talking to the police. At the least jus

Why do people respond to letters from lawyers? I thought it was common sense to have your own lawyer respond. It’s like talking to the police. At the least just don’t respond at all? Wait until they file a lawsuit. If you didn’t do anything wrong it will get thrown out with one motion at least in the US. I am not a lawyer.