Earlier quoted context omitted.
Why do meat eaters disguise things as burgers, sausages, and nuggets?
They don't "disguise" things as burgers, sausages etc. That's how meat has been prepared since time immemorial across all cultures. Why do vegans and vegetarians insist on disguising vegetables as meat - now that's the question. Even though the same cultures have a mind-boggling variety of foods that don't involve meat, and don't pretend to be meat.
As to why vegans do it - hotdog buns are really well designed for holding a tube of protein.