I’m open to the argument; however, the change in kinetic energy involved in a crash when someone is speeding is going to be more important than their lane position.

I’m making an assumption that the sort of person who comes on to Reddit and to complain about left lane camping is the same sort of person who will drive 90mph and tailgate someone going 75 who is still passing people to their right. My assumption might be wrong, but the tendency of drivers in the US to treat the road like they’re playing Need for Speed contributes to high severity crashes more than grandma going the speed limit in the left lane.