Proofreading involves more than just checking grammar, and AIs aren't perfect. I would never put my name on something to get published publicly like this without reading it through at least once myself.

You can literally use tools to check grammar perfectly without using AI. What the LLM AI does is it predict what word comes next in a sequence, and if the AI is wrong as it often is then you've just attempted to publish a paper with halucinations wasting the time and effort of so many people because you're greedy and lazy.