High beams are really for rural roads with very little traffic. If there are at least three lanes of traffic in one direction[1] and enough traffic that a car in front was able to see the collision in their rear view mirror, high beams are not advised.

Using them in this situation will cause major glare from mirrors of the drivers in front, and possibly for the drivers in the opposing direction.

[1] as indicated by the stopped vehicle being reported in the center lane

Which makes the radar range being less than the stopping distance less salacious.

Plus the radar is for gauging relative speed so the car can speed up to the set point if safe or slow down if the car ahead is.

It is not for finding stopped stuff in the middle of the road at high speed. I hear there are too many false positives for that to be done.

I mean yeah if you're on a pitch black highway and you can't see anything outside your headlight beams, you probably shouldn't be going 80 even if that's the speed limit.

No idea where you live but this is probably 99% of highways in the US. Where do you live that the highways are illuminated?

You can't go 80 on most highways.

No street lights doesn't imply pitch black. It may imply poorly illuminated. I can't find a date, only a time, so I can't guess at lunar illumination or cloud cover.

But we don't know how many other vehicles were on the road and what light they were casting. The bystander who reported witnessing the crash was within visual distance, so couldn't have been too far ahead of the MachE. It wasn't reported if there were any other vehicles. If you have enough vehicles on the road (with their lights on) lack of overhead illumination isn't too significant.

Canada

So be it. Going 80+ at night might not be a good idea on most roads.