These type of incidents, which are rare and can’t be avoided, is why I took my bike off the road and only take it to the track.
Maybe the first rule of riding is “it’s not the safest form of transportation and you must accept the risk”?
Myself, I'm a cyclist, but a lot of motorcycle rules and bike rules overlap.
I actually feel far safer on a motorcycle than a push bike, because I have much bigger contact patches, far better brakes, stickier tyres and the ability to out-accelerate almost any kind of trouble. I'm also wearing at least half leathers and a proper full face helmet.
I'm not being pedantic—there are situations, like the one described in the GP, that you just can't humanly do anything about.
"The Matrix Reloaded" featured a 30 minute action sequence showing what it's like when a tiny fraction of other drivers are actually trying to kill you. Spoiler: without Neo swooping in to "do his Superman thing" and save you, you're dead, even if you've got automatic weapons and kung fu training.
I'd amend it to "anything that you could reasonably have anticipated is your fault, including people pulling out in front of you, cars changing lanes as if you weren't there, etc."