Interesting! I am not sure I agree, but only on the most semantic of levels. I think Sam and Dean don't think this is a big deal (and I think that shows in the way they handle the hunt - way different than they did when they were just starting out in the early seasons), but monsters always pose a threat. They're usually jacked up somehow, so even the lowliest monster has an advantage over just one Winchester (though usually superior skills/knowledge/luck comes through for them - or, the other Winchester). Sam needed rescuing yet again this week (and he does so often, you know? I find it a little frustrating how lackluster he seems because they always need to use him as the one that's in trouble to create tension. I mean, seriously, when was the last time Sam kicked ass and took names at hunting, and/or had to save Dean's bacon). ETA: And there was more to this sentence, but, working, and arg, lost the train of though.

But I see what you mean on a meta level, monsters of the week are tough to choke down considering there's wars above and below going on.