Peple misunderstand “Closed as duplicate” as an insult, when it’s just the hint to look at the provided link. If you didn’t find the answer previously, this just means there are multiple ways to express the problem, which use different words and thus don’t all find the same google result.
That's fair, but if you edit the question to explain how it's different (without which, how could anyone even answer your question?), it can be (and often is) reopened.
Some times the question has no semblance at all. Other times the answer has no semblance at all. Some times there's no answer at all. And obviously, modern SO is full of people that will just post a ridiculously incorrect answer. There is a wide variety of possibilities!
I remember being very surprised as a I followed one of those links and got the answer I needed. But I don't remember exactly when.
They also changed the wording from "closed" to "on hold" years ago, and I don't think I've ever seen the people complaining about the site take any notice.