Which is ok and entirely valid regulation. It is ok to not want the industries to rewrite meanings of words.
[1] Relax, I'm joking.
But burger, sausage and nugget are just about the shape. Restricting that only to meat is silly. Veggie burgers have been around for multiple decades. There's absolutely nothing misleading about that.
Also consider the many products that are something-flavoured (often fruit, but also other things) without containing the actual thing, yet clearly marketed with the thing they don't contain. Or fake chocolate. Pizza containing mostly fake cheese. Is that not far more misleading?