Chef's in Ontario are a red seal trade. When I was there to write my tech license, I bumped into a hot chick who was there to write her Chef's exam. I asked her what kind of questions are on a chef's exam. She said that one of the questions they ask is how to properly make a club sandwich; layering, ingredients, etc. I don't remember the details now, but I do remember that if it's served on anything other than 3 slives of toast, and if there's a meat on it that isn't bacon and turkey. It's not a club sandwich.
TLDR: Whoever told you that is full of shit.