What’s the point of using sic in a quotation that was obviously pasted and not transcribed?
It might be understandable for a digital medium which can be hard to paste from, like a PDF.
That said, if we're being honest, I think you're right that the reason for adding 'sic' is usually as a snarky way to say 'haha, they made a spelling mistake', and in the hope that it helps to undermine a point which the transcriber is usually arguing against.
In hindsight it wasn’t completely obvious. I ended up googling the phrase to confirm.
Just seemed very likely that the quote was taken from an email or forum as opposed to some heard speech or a bulletin. But point taken about the fact that some people might transcribe digital text.