What? Why is that a false choice? The only way you got caught here is if you literally gave an LLM the PDF and used its response verbatim.
And they didn't give a permanent ban or anything, these authors can just resubmit to another conference, of which there are many.
Imagine you are poor and a rich person offers you a choice to steal some bread or some beer. It’s not a real choice because you are poor and therefore steal. The rich person offering the choice is wrong.