200% (2x) higher is not as high as I believe many would guess. If you did a straw poll you'd likely get answers like 10x, 20x etc. Hell SOBER driving had 10x more crashes when you/your parents were learning to drive compared to you/your kids.[1]
It's actually 3x, not 2x. Probably why writers shouldn't express things this way, but it's clearer reading the article, this is a 200% increase, not that the rate is 200% of the normal rate.
Also, the link to the NHTSA doesn't work, but I'd be interested to read the primary research. Concern is they're just taking accident rates for sober drivers and BAC 0.08 drivers, which isn't a fair comparison because they aren't time matched. As in, drunk driving is a lot more likely to happen very late at night/early in the morning when bars close, when traffic is extremely low and accident rates are also very low. If your chances are 3x the chances of a person driving any time at all, you're much more than 3x the chances of someone driving unimpaired at 2 in the morning.
Of course, even if they time match the rates, there's still the reality that a lot of sober people driving at 2 in the morning are still impaired. Tired driving is also quite dangerous.
I found literally the most conservative statistic I could for how dangerous drunk driving is - that someone whose impairment is literally on the threshold of legal is 3x as likely to have an accident than a sober driver.
I could have gone for a shock stat - 100000 people a year are injured in accidents involving drunk drivers. 10000 people are killed.
I could have taken the position that a typical drunk driver is probably actually 10x as likely to have an accident as a sober driver, based on those NHTSA numbers.
But I didn’t need to to make the point that a self driving car could be literally twice as likely as an average driver to crash and that would still be ‘better than a drunk driver’.
[1]https://en.wikipedia.org/wiki/Motor_vehicle_fatality_rate_in...