Imo, the real issue is that people seem to think that smart mathematicians or scientists don't argue like normal people, don't get emotional when arguing and always talk from divine truth.

The issue have nothing to do with mathematical correctness, so you can't apply the same principles. This is not math. But, Dijkstra's it's not being logical in arguments, because he is not of dick and likely this style of arguing was working for him in his life.