I'm wrong

I was playing with a few veteran badminton players.
They were giving me a few tips on how to improve my game.
Suddenly, my friend laughed.
"Aiyo, you are gripping your racquet wrongly!!"

Other veteran players observed and unanimously agreed/were amused I didn't even get the basics right.

My veteran badminton player-friends told me that once I have managed to grip my racquet correctly, my shots will dramatically improve.

I was thinking.

I've been holding my racquet this way for years.
Nobody ever told me that there was the way to hold the racquet.

I got scared. What I had believed to be true was actually blatantly WRONG.

I fear for more discoveries...