[dTal]

>in dismissing work for such trivial reasons, you risk ignoring things you might have otherwise found interesting

Not dismissing work for trivially avoidable mistakes risks wasting your precious, limited lifespan investing effort into nonsense. These signals are useful and important. If they couldn't be bothered to proofread, what else couldn't they be bothered to do?

>spent their limited resources focusing on what's more important

Showing that you give a crap is important, and it takes seconds to run through a spell checker.