Or perhaps you are putting too much emphasis on things like The Republic, which I think everyone agrees is Plato expounding his own doctrine, without any real pretense at paraphrasing real events. We also don't have much evidence for the historicity of _Euthyphro_, but there is a good reason to think real events went more like it.

Socrates did not teach mathematics or other things where there is (sometimes) a single obviously right answer. A real-world Socrates would constantly be blindsided by valid but unexpected points made by his interloculators. Such nondeterminism is great for genuine dialogue, but not for maintaining an aura dialectic invincibility. But if he takes a deconstructionst troll strategy, he can always come out looking clever while honestly repeating that he himself knows nothing.