From my (no doubt very limited) understand, [breackets] don’t necessarily indicate BH. Could be BH that are controlled or restricted, or other situations or people that are under control in some way. That’s what I have always understood. I took the [SCARE] event in that way. That was either known about beforehand by WH and thus restricted in some way or would be caused by WH.
Let noble thoughts come to us from every side.
Rig Veda