In an ideal world, I'd agree with you, but sometimes, especially in live conversation, let alone public debate, you just don't have the time to go through all the premises and the syllogisms. Plus, it's unfair to expect everyone to be able to properly counter your arguing and point out its flaws. That's something you should reserve to your Worthy Opponent of choice. Wasn't there a figure like that in (Hassidic?) Judaism? A "comrade of studies" or something like that?