In the end, polishing queries is about increasing your chances. Yes, some books get snapped up and sold for seven figures. Yes, some books with absolute terrible queries land agents, and then deals. Yes, Soul of the World was a 220k debut and Annihilation follows an unnamed protagonist with no emotions and on and on--exceptions abound for every guideline.The problem is, if you get published, you already are an exception. Hoping to break the rules and still 'make it' is hoping to be an exception among exceptions; very difficult. A good query helps. And a bad query often does signify manuscript problems. There are, of course, always exceptions; the 'good' query that turns into a disappointing MS, and the hot mess query that is masking a masterpiece. But I see no reason to count on being an exception among exceptions if that's at all possible to avoid, instead.I agree with others that QLH can be a difficult place but the goal of it is good, and the premise of it is sound. Besides, if I can be frank, I think the real purpose QLH serves (unintentionally, but still) is to point out when a MS isn't ready, as opposed to the query itself. I'm going ot stick my neck out and say that in the majority of cases, if the manuscript is ready, it CAN be queried an expect requests, even if no offer or eventual deal. (As ever, exceptions exceptions exceptions...)