While the other person was way to negative in their response, I can definitely see their point. How does being a CTO automatically confer knowledge of how DNS w

While the other person was way to negative in their response, I can definitely see their point. How does being a CTO automatically confer knowledge of how DNS works, especially in very technical detail? Seems to me a clear case of an appeal to authority argument, which is usually (and probably also in this case) a logical fallacy.