Dupes have their uses - they do a pretty good job of ensuring a wider variety of Google searches lead to the answer. Basically, a built in “this paragraph is a synonym for this other one”.
That’s really not been my experience. I find the non duplicate question is normally somewhat related but not actually useful, being subtly different or quite old etc.
That said while SO has been effectively useless to me for years, if you find it’s helpful then more power to you.
If they want to moderate like that fine, just delete the dupe questions.