How is it highly processed? They are mass producing a naturally growing fungus, not unlike farming mushrooms. They seem to be adding some seasonings and sodium before packaging but thats not "processing" exactly.
It's transformed from its naturally-occurring aspect into something resembling the texture of meat. That is processing. I suspect that it's also a non-trivial amount of processing, but I could be wrong. Contrast this with grabbing a handful of chanterelles and putting them in a bag.