Because it translates emotional reality directly into physical in ways that have no basis in our actual understanding of the universe.
I just don't see why that's a problem. There are many theories about consciousness that essentially
require the possibility of mind affecting physical reality.
If we have this argument, we'll just all draw our own lines in different places, and I do not think anything will be resolved. Since Damon Knight is no longer with us, we can't even call on him to come over and point at things for us.
Wasn't intended as an argument, merely an illustration of how fluid the lines are even within genres. SF is not so separate from other genres as we might believe.
Agreed, to an extent; there is too much intentionally left blank - cf. the discussions elsewhere about the exact nature of God in the Dresdenverse - for it to really feel like an entirely SFnal world to me.
Very few SF works discuss
everything. Much is left unexplained or even completely ignored - for example, Damon Knight's
Why Do Birds leaves the majority of the SF-specific aspects entirely or minimally unexplained. Yet it's considered good SF.
It's just been my experience that little
truly separates the genres; even hard SF, when well-written, is not so different from others - at its heart, a good story is still... well, a
story. And for human readers, there's a certain set of shared-experience considerations that always enter into play.
Don't misunderstand me - I think that SF/fantasy are more freeing than are other genres. They put the human experience into unexpected and even new contexts, yet the human-experience aspect always shows through. They go beyond but bring it all back home to the human. And that's a good thing, in my opinion.