I don’t understand why you think that guy was conflating communism and socialism. He claimed communism is moneyless, and in your response you said “neither is moneyless.” What’s being conflated?
And it’s worth noting that most definitions include, if not expressly the word “moneyless,” clauses about all property being held in common. And if there is no property, then there is equally no money, by definition (as money is simply a system for the valuation and exchange of property).