It looks lovely from above, and in a remote location of Idaho there's no one to care, but I'm sure it's absolutely teaming with mosquitoes, a kind of perfect habitat. And a perfect habitat for all sorts of other creatures and plants who bother no one.
It's not just because of beaver trapping that this waterform has been so systematically eliminated; people go to great lengths to remove backwaters just because of mosquitoes. If we made mosquitoes extinct – not just the disease-carrying mosquitoes, but any that bite humans – I think we'd see attitudes change surprisingly quickly, a sudden peace in an ecological war has lasted millenia.