> Are spelling correction PRs not welcome?
I think a true spelling correction would be welcome. But I think the kind BS attitude the GP is describing often leads to useless reformatting/language tweaks, because the goal isn't to make the repo better, it's to make a change for making a change's sake with as little effort as possible.
Kind of like how on the Salesforce support forums, there are a lot of incorrect answers from people who don't appear to have understood the question, but they all have "Please mark my answer as helpful" at the bottom. (And this started long before AI.) If there's an incentive to "contribute," even if it's something as small as being able to put "Salesforce support volunteer" on your LinkedIn page, and it's very easy to do so, you'll get a lot of low-effort (or worse) contributions.
I’ve always wondered how salesforce and Microsoft get such huge numbers of supporters doing that unpaid work for them. They’re often Indian sounding names so I suspect that one or more of the big consultancy or outsourcing companies uses it as a hiring signal.