[refurb]

That’s a subjective distinction.

I would say a chicken nugget is just finely ground chicken meat with some binder like egg or flour covered in breading.

[AnIdiotOnTheNet]

Clearly you've never heard of meat glue.

https://en.wikipedia.org/wiki/Meat_glue

[refurb]

How is that different than making things like head cheese? You boil bones and connective tissue and make a loaf out of the congealed proteins. It's been done for centuries. Or were our ancestors eating "ultra highly process foods" too?