> There's a danger, while steelmanning, that you might come up with an argument that sounds good to you, but it's actually weaker to the opposition. Therefore, while trying to steelman their argument, you actually fill it with holes.
That's why normal practice is to check: "So I hear you saying something like this: <steelman argument>. Is that right?"
> To truly do it, you have to embed yourself not just in their rational thought but also in their worldview.
Indeed; the best word I have for being truly persuasive is "incarnational": You have to enter into the situation of the person you want to convince, and see the way out of the cave they're in from where they are now.
> And I really mean the part about it being dangerous. In all honesty, we aren't the purely rational creatures we think we are. Honestly steelmanning an argument changes you. And maybe that's for the better in some situations, but I certainly wouldn't take that for granted.
I dunno; I have more faith in the power of truth. You certainly need to be careful that you're not taking information only from one source; if you only listened to Goebel's propaganda for 2 years you'd certainly start to have Nazi patterns of thought infect your thinking. But if you want to rescue someone who has only heard Goebel's propaganda for the last several years, you have to learn how to recognize the flaws in thinking from within it.