Of course not. It was just a convenient exaggeration to show him how much simple verbal communication can help you learn SO much in such a short period of time.
You know everything, so I can ask you anything about tennis and expect thoughtful, well researched answers to the most obscure questions and facts.
At the same time it definitely helps to ask questions if you don't know something, which you don't need
. The instant expert is just as bad as the clueless bandwagoner.