Today, most people who are doing curation of Stack Overflow are not engaging with a question at all. They down vote and move on as any attempt to help is seen as rude... and just down voting and moving on is also seen by some as rude... and not doing anything and having a question get ignored is also seen as rude or frustrating.

As there are many fewer people answering questions compared to the rate of questions being asked the overall "is stack overflow rude or not" is a "yes." But engagement numbers are up as people keep asking them.