If it doesn't matter, why did the previous poster mention them? It's pretty clearly a type of argument called an "appeal to authority", where an authority is

If it doesn't matter, why did the previous poster mention them? It's pretty clearly a type of argument called an "appeal to authority", where an authority is cited to add credibility to a position. It's usually considered a pretty weak form of argument, but it can be effective. So the credibility of the cited authority is relevant.