/lit/ - Literature

I asked this question once before but didn't get any good answers so I'll try again at the beginning of the thread.
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Why is almost all high fantasy so low-concept? Every blurb I read sounds like:

>in the land of Clichéa, a guy sets off on a quest to do a thing
or
>the above but with DINOSAURS
or
>the above but it's a 2meta4u parody deconstruction

They all sound like the same thing. Don't get me wrong - I'm sure many of them are great and unique books that are worth reading; but all they have going for them is someone's recommendation - "check it out, it's high fantasy and good". Considering how many of them are also part of doorstopper n-logies, I rarely take the risk to try them.

Sci-fi and low fantasy doesn't seem to have this problem, I usually know whether or not a premise interests me from the start.