I don’t think this article is accurate. I went and checked the ingredients of some of my favorite truffle products, and every one of them has only real truffle, and no flavorings in the ingredients.

For example the Marin French Cheese Truffle Brie sold all over the Bay Area: https://marinfrenchcheese.com/cheese-collections/truffle-bri...

Ingredients: Cultured Pasteurized Cow’s Milk, Pasteurized Cream, Truffles, Extra Virgin Olive Oil, Truffle Juice, Salt, Natural Aroma, Microbial Enzymes

No truffle oil or natural flavor. I suspect this article only applies to low quality stuff, but not everything is low quality.

I suspect this is just like sourdough bread. Sure, sourdough at Walmart is just cheap white bread with vinegar added and tastes nothing like real sourdough. But you can get real sourdough almost anywhere if you pay a little more and know what to look for reading the label.