My best friend has a zx-11 and a zx-9. He has gone over once and it was minor. He has also put literally hundreds of thousands of miles under him in his 48 years.
The thing about bikes is that it takes skill AND a natural hand-eye coordination and certain mindset to not get yourself killed. If one is in that group, one is fairly safe on a bike, irresponsible behavior notwithstanding. If one is not, they are an accident waiting to happen.
An oversimplified generalization I use is this: If you were always the last to be chosen for sandlot sports, or if you found you hated or kept falling when riding a bike, you might want to avoid owning a motorcycle - permanently.
Likewise if you find yourself drinking and driving...
I agree, and fortunately, I seem to have the appropriate wiring to operate a bike safely. However, this is not something that can be empirically proven to someone else, short of riding one's entire life and dying of something completely bike-unrelated (and it's hard to say I told you so afterwards).