How easy would it be to pass a regular banana off as an organic banana? How easy is it to label one thing as something else? Makes you think a bit.
Before I seem contrarian, I will note that I love sashimi, and of course I can tell the difference between tuna and salmon sashimi. I don't want to think I have a dull tongue, but other times, when I'm just hungry, I don't care. I see the point of worrying about being ripped off when thinking you are buying high end fish, but if I buy cheap fish in a meal from a stall, I don't really expect much in the way of authenticity, so I'm not sure I would care. Perhaps I am just more forgiving.
However, isn't the toxicity of the meat is a separate issue? I have no idea how the FDA tests for that (sample testing?) but it probably isn't just discrimination on the species of the fish.
Aside from that, it could have health ramifications. Most people eat organic to avoid herbicide exposure, and most people use olive oil because it's considered healthy. Obviously there are countless examples. You should get what you pay for.
If I don't care what kind of fish I am getting, I order fish and chips, or fish tacos.
If I care what kind of fish, I order tuna or eel or salmon or trout...
One might make a choice based on mercury content, environmental friendliness, dietary restrictions (medical or philosophical), to support (or abstain from supporting) a particular industry, or something else entirely.
To allow fraud which can't be detected on the palate is to deny buyers their freedom to choose based on any criteria other than taste.
It is not up to the producer what criteria buyers use when choosing their purchases.
Also, if the consumer shouldn't care, the producer shouldn't either. If the producer thinks it shouldn't matter what it says on the label, well then... no harm in putting the right thing on the label, right? No? I guess it matters then.
It's been banned in Japan for 40 years.
The USDA banned it in the 90s and then unbanned it in 1998.
Here's another perspective on it, how often will you notice? If you don't then does it matter?
Shocking, the oil actually smelled like olives vs the stuff in the bottle, which usually smells like nothing. That oil also had a sharp olive taste which is actually missing from the store purchased stuff as well. There is a bit of an olive oil industry starting in texas as well, and that stuff when purchased directly from a farm (orchard?) tastes like olives as well. Makes me wonder if 100% of the olive oil i've been purchasing in the last decade is fake, or per some of the articles strongly cut.
BTW: Its not a function of the age either AFAIK, I purchased nearly a gallon when overseas and it lasted me over a year, all the while maintaining the distinctive smell and taste.
A place that is doing something like artisanal premium extra virgin olive oil (which is what it sounds like you were getting) should have exactly the relation to generic "olive oil" that you describe, even if nothing involved is fake or adulterated in any way.
Which is not to say a lot of what you are buying as generic "olive oil" might not be fake (there's plenty of independent reason to suspect that), but what you describing doesn't really indicate that.