I’m not sure about that voice point. Because quite often it is not matter of personality but weak english skills. On other hand, fixing just grammar errors is an awful job. Someone wouldn’t then do anything else.
At some point somewhere here I had a topic about similar things, when I was worrying if faulty english and fixing sentences using AI-proofreading could give wrong image.
Unspoken point behind it was
- credibility
- searches (world wide and inside a forum)
There was two things I didn’t realize even I should know better.
First was the fact that out there is zillion different type of spoken and written English, not only en_us and en_uk. Meaning mostly native english speakers have used to different englishes and dialects. Sometimes it may bother an individual and sometimes not, but that’s how things are.
Second was very finnish point of view. We have quite many different spoken dialects, but we should write using so called book finnish or clean common language. If one uses dialect or slang type language, it destroys credibility right away and gives… not so good first expression. So, my issues with right enough grammar was growing from that. When I took more realistic approach I stopped using proofreading (even I propably should use it, but it changes sentences too much to AI’sh). And it makes grammatical errors too every now and then and I don’t like to fix those too [1].
My weak point is I’m totally happy when someone fixes my error and badly formed sentences. And I equally agree that topic titles are priority and fixing posts is too expensive. But… we had here every now and then misunderstoods because of language barrier and that’s why we need AI-translators more than moderation in this meaning.
I don’t think any of non-english will be offended because of text edits. But… native speakers with bad english may be totally different story 
and that is very finnish problem in the meaning of our school system that is or was very strict about that. It didn’t matter if you could explain what you need of you can offer, but if one used wrong preposition or words in a sentence were in wrong order, the 9th gate of the hell would open ↩︎