The synthesis of the content of these two posts is telling us something, I suspect, though I don't have the experience/data to properly suss it out.
We still occasionally lose a trained person wearing PPE on a cruiser or standard motorcycle, but when you read the accident reports you realize that they'd often still be just as dead if they were in a car or other vehicle short of something armored.
Stuff like 'oncoming car crossed the median...'
Where you get the most deaths though, are things like 'Squiddies'. Probably because they're traditionally navy, though with current ops other services have caught up some.
You have a junior enlisted get back from a deployment, pocket full of sea pay(or deployment). They go out and buy a 'cool bike', paying cash for a 1k or so CC sport bike. They haven't ever ridden a motorcycle before, and they take off, barely knowing the controls, without a helmet or other safety gear, and splat themselves into something unmoving at high velocity because they don't even know how to stop, much less turn.
When they detailed the deaths of the year once, over half of them were violating regulations and were within their first month of riding - no BRC, missing significant PPE(like helmet), etc...
The sport bike category was so bad by itself that they were putting together supplemental training for them when I left. Without them motorcycles were only a little elevated in danger over cars.