What I'm getting at is that they didn't confront the grooms, the cooks, the lice in the rushes, etc either. But I assume these wouldn't be described as "bypassed encounters".I was going further along in the scenario as I was imagining it. In my head, the adventurers entered the castle, did their thing, and left without confronting those guards at all. Yes, of course, the encounter isn't resolved until those guards no longer pose an immediate threat.
You talk about threat, and perhaps that is part of it.