You wouldn't hear about it unless the activation was triggered by egregious pilot error and you're scouring aviation news sites.
It's not fine if the wheel position sensor fails and this causes the car to slam on the brakes going 65mph down the highway.
Been there, done that. It's an unpleasant failure mode, but it is survivable.
And, anecdotally, I've had ABS kick in in some occurrences for which I was very thankful.
Suppose the crash probability on a normal flight is 1/1E7, but without MCAS it's 100x more dangerous, or 1/1E5. Suppose MCAS failure probability is 1/1E6, the probability of an additional crash due to the failure of MCAS is 1/1E11, which is acceptable.
The problem is that in practice, the crash probability if MCAS fails is empirically 2/3 instead of 1/1E5, because MCAS actually causes the crash rather than merely failing to prevent a crash.
"ABS has close to a zero net effect on fatal crash involvements."
Further down, there is a chart which seems to show that ABS is associated with a huge increase in fatal accidents in inclement weather, and a large increase in side impact accidents, both fatal and non-fatal.
Maybe there's something obvious I'm missing?
Think about it like the Antilock brakes on your car. Suppose the wheel position sensor fails. It's fine if the car puts up a warning light and says that you don't have antilock brakes anymore. You can drive fine without them until you can get them fixed with a minor safety impact. It's not fine if the wheel position sensor fails and this causes the car to slam on the brakes going 65mph down the highway.