Yeah, I was talking more about authenticity than about food quality. So "isn't edible" was probably the wrong choice of words, you are right.

It's just that e.g. you can't get English breakfast sausages in mainland Europe, so they just substitute them with Nuremburg sausages, which look similar, but taste completely different. Breakfast sausages are really bland, which makes them fit in nicely to a breakfast, while Nuremburg sausages have a really intense flavour. They work well for a barbecue, but on a breakfast they really don't fit in and the combination is pretty bad.

Similar story for fish and chips in Europe. If you buy that stuff over here, you get thin fries instead of chips (which are softer, steak-cut fries), you get some random breaded fish from the freezer (not e.g. a beer batter) and the malt vinegar is usually left out or substituted with spirit vinegar or cider vinegar. The result kinda looks a bit like the original, but it tastes completely different.