assume every other vehicle on the road was driven by a homicidal idiot who wanted to kill me, given the opportunity. As a biker survival required that I deny them the opportunity.
Absolutely, this has alway been standard advice. When I learned to ride there weren't any motorcycle instructors, you just got a provisional license, a 250cc bike, and went out and learned for yourself with your mates. Darwinism in action, it weeded out the crap riders pretty well

I remember when the first dayglo 'Sam Browne' belts came out. One school of thought said they were beneficial because they helped other people to see you. The other school said that they were dangerous because you were more likely to assume that other road users had seen you. Better to not wear anything bright and assume you were invisible.
I was in the second group, and never used any aids to visibility, not even headlights in the day time. I survived fine for the 35 years I rode bikes.