That's all fair, and I don't blame truckers for the accidents caused by others. That doesn't change that they have a job involving long stretches of boredom punctuated by very rare, high-stakes, split-second reaction moments, so they shouldn't be allowed to operate past a certain point of fatigue.
I peeked at some statistics, and it looks like there were around 4,000 fatalities involving large trucks. Out of (I'm assuming this includes commercial vehicles) 35,000 total vehicle fatalities.
11% is not nothing, but it's also not the 89% chunk.
Long stretches of boredom punctuated by split-second reaction moments also describes my driving... and I can do that in anything 5 tons or under without any sort of regulation (except a passed driver's license test some number of years ago).