You’re stupid. Because I’m nice that I’m letting you know that you are. Other people wouldn’t care to let you know that you are.
It’s like you going up to the guy who caught a white bass and say, “you caught a white bass”. Trying to be nice, he said, “ I didn’t know it was a white bass”. But in his mind, he’s thinking, “what an idiot”! Now replace the white bass as the paper trading and the guy who caught the fish as Wally.