But this is something that's really difficult to regulate. A good example is that wine brewed from natural yeasts that smells like horseshit. It was branded as "barnyard".
How does that make things hard to regulate?
Now, catching people selling a cheaper truffle as a more expensive truffle may require more educated customers.
Years ago, I bought some very pungent blue cheese, must have been either from SW France or NE Spain. Definitely not a household name, and priced quite high. One of the worst eating experiences I can remember. The flavour was so strong a small crumb was enough to burn your tastebuds. Almost painful to eat, and we had to toss the thing out.
It smelled really good, though. I learned my lesson. These days I refuse to buy any unfamiliar cheese I can't sample in the shop first.
If you see a fine wine with 'hint of boxwood', run.
If we go to another country with good wines, we ask the waiter and it works out better than looking at the wine menu and making assumptions. One waiter in Sicily even suggested that he chose the wine for us and we were very satisfied with his choice after we also tried to get the same wine ourselves and ordered something different.
Also, Moldova used to export crappy sweet wine before their agricultural products were banned in Russia. Now it exports mainly into the EU and they have some good quality wines if you skip the ones made from hybrid grape varieties, which I wonder why I've even found on the EU market. Must be the new 2021 regulation allowing hybrid varieties in wines with protected denominations of origin. Apart from the usual varieties, they also produce wines with a Georgian variety called Saperavi, which I like quite a lot and also a local older variety called Rara Neagra which is popular but I don't like because it's acidic, however it can be sucessfully used in blends where one needs more acidity.