Ignoring someone just because their military is not very good at fighting wars is not a very good idea. This is not a video game, these are real people dying. It doesn't matter who wins, it's still a horrifying, barbaric and frankly anachronistic activity that you do not want to engage in under any circumstances.

It doesn't have to be large, aggressive and super dangerous, though it is, like any nuclear power. It just has to be aggressive for it to become wise for neighbors to keep themselves generally well-prepared.