Among the many values of these sorts of hive mind forum threads is the chance to learn and calibrate what is best practice. As far as flashing brights, I see the dilemma. We know the main goal is to be seen. Swerving is one way to try and be seen, and would work many situations. I live here in the very rainy PNW, and this may play some part. Water spray and dirty windshields further reduce visibility.
I hear the concern about brights flashing, and yet see a role for it at times still. If I am flashing brights, I am only seeking to be seen. If I am flashing brights, I have seen that threat from some distance. That means my eyes are on them. If they see my brights flash, and interpret that to go ahead, then they have seen me. So far so good. If I am going a reasonable speed, and have sight distance in play, even if they are boneheads and pull out I have time to evade. Seeing me, and seeing them, is still the highest priority.
On a dry day and dry road with good sight lines, I would be way less concerned and see swerving as a good approach.
Or maybe I will go ahead with my plan to build an LED powered billboard mounted to my windshield, about 8X8 feet, that displays a picture of a big scary 18 wheeler with skulls and rim spikes barreling down on them.