I agree that due to being a distraction after the error is fixed, this is a tradeoff, and I would like to reduce that effect, perhaps a way to tag a thread as "resolved proofreading issue" that would collapse it be default or sort it to the end.

Kuro5hin, a general-purpose discussion site that's since been taken over by trolls, had a mechanism like this. When submitting a top-level comment, you could mark it as "editorial", which would keep it hidden under default view settings. This trick worked pretty well, and I notice that K5ers seemed more eager to offer editorial suggestions than LWers.