I hafta say, it seems like you’re the one with the ego.
Edit: if I had to guess, the cook probably said something like “I made a lot more money before I worked here.” And was then asked why.
First, the commenter could have been paraphrasing a longer conversation that led to that question.
Second, the "I used to be somebody" conversation is more common than you think. Asking "If you were somebody, what happened?" is usually the question that is being invited to be asked if someone brings up this topic.
He was talking about making good money in IT, so I asked why he didn't continue working in IT. (At least that's how I remember a conversation from over 20 years ago.)
He was originally talking about playing computer games on early computers, so I thought I'd get a story about why he left tech. (IE, laid off and had to change careers, couldn't keep up with changes, didn't like the stress.) I was quite surprised that he was a felon.
He really didn't tell me much about what he did, either. I don't want to repeat much here, other than to say he got greedy.
At a high level I don't think there's anything wrong with what he did. There's plenty of legal activities that are "grey" morally: Oil companies, tobacco companies, investments (stock, 401ks,) where ordinary people don't realize the nasty things the companies they own do...