How did you read that out of his response?

I think he just is asking how the dealer didn't notice the cheating.

I don't see any arguments their making. They simply stated/asked a question, then provided some information and a citation.

I'm baffled at how that is somehow an endorsement of cheating and that its okay to cheat if no one sees them?

I don't think anyone is arguing that it should be considered a valid roll. But being illegal in the criminal sense? No way, that's a bit much.