A lot of commenters here don't seem to get it. France has a strong culture, and a strong food culture in particular. They've determined as a society that they wish to protect it and therefore names of things, matter.
Same discussion in Germany and I wouldn't say we have a strong (food) culture, surely not to the same level as France. This is simply protectionism by the food lobby, I know zero people who take offense at calling oat milk oat milk.
As an outsider I would say Germany has just as recognizable of a food culture, and nearly as much of an alcohol culture.
This is a bit racist, but you'll likely find that those who don't get it are Americans. And it's not so much that they don't get it, but rather that _every goddamn thing is a fight with these guys_. You can't just have an opposing opinion that can be thought about, you have to be wrong, and then beaten.