Costas and David are right to mention the training aspect, but could the biker have reacted in time to save himself from the awful conclusion? It's debatable. I think we can say the driver of the Saburu was a complete K**b.
If you look at the position of the biker approaching that right hand bend, he could have been farther over to the left. Also, he could have headed for that ditch on the left. Probably though a case of target fixation and panic.
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The bike being further left would not, I feel, have helped the situation. The Scooby took all of the bikes lane thus the only "safe" place he could have been, while still on tarmac, was the wrong side of the road. Given the bikers likely view through the bend then the requirement to be right over to the left was reduced as, most likely, he would not have benefited from such positioning to get extra visibility. Especially true if the the left edge of the tarmac was far from perfect.
I think the ditch option is only there because we know the car is not going to continue its "slide right". That's something the rider didn't have time to know. I see no reason for the biker to be especially "worried" about the on-coming car until it's in the bend and drifting to the wrong side of the road. We all "note" on-coming traffic but we all expect it to "do the right thing" unless there is specific reasons to suspect it won't.
Either way, I expect neither the Scooby driver or the bike rider went out that day expecting or wanting to have an accident. I also expect that if there was the option available, both would rewind time and do things differently. The Scooby driver misjudged a situation (and we've ALL done that when enjoying a nice road!!!!) and, on this occasion, someone else paid a substantial price as a result. It's a sad situation but, making poor judgment calls resulting in others suffering is something individual human beings have been doing since the start of the human race, and will continue to do for as long as we're here. That doesn't make it right, it only makes it inevitable. All I can say is that I'm glad that I'm not in the position of either of these two but am also fully aware that, every time i use a motor vehicle, I am not be immune from appearing in either role.