Problem is that the "feedback" expressed on the OF's are RARELY useful or constructive in any way. Heck, you're lucky if you even get something coherent. Usually it's some pointless whine about something too hard, too easy, or whatever. Sometimes you get semi-well-put-together posts but they're from armchair developers who have no idea about what is actually reasonable to expect from the game; or alternatively, they're suggestions for stuff that would actually just make it worse.

Point is, it's perfectly fine for someone to say they're tired of hearing whining on the forums because a lot of people come here to express their (flawed) opinions on the game; the thread is (in different words) pointing out how most of the feedback is actually pretty useless.