Thump, in the end I agree with you.
Like me (always) bringing up using a mirror, its something that we can control, and we all know there are those moments where a few seconds of heads up of what's happening behind (narrow road, incoming rear truck, incoming front truck, car with wide trailer etc-- all of us meeting at same spot) can safely and clearly show us that we should go onto the grass.
Win win for all, easy and stress free.
cheers