Perfectly safe to go well over 120 mph at times ??? You are having a laugh.
Yup, perfectly safe - at times. Completely illegal too, no question (though I could say in Germany, it would be totally legal). As I said, which you ignored, at other times 10mph would be too much on the road.
The prescribed speed limits are law, but they don't mean anything exceeding that is unsafe. I know my capabilities, i know my car/motorbikes capabilities, and I know that road. When that road is empty, the visibility is great and the environment conditions superb, 120mph+ is absolutely fine for me. When there are other road users doing 40mph, including those uncomfortable with driving quickly, I don't harass them or tailgate, I just overtake when it is safe.
And of course, it's my fault if I am caught speeding - whether or not I think it's safe, I would have broken the law - it's a fair cop.
Like I said, anyone with a licence should be capable of rational decision making. If not, they shouldn't have a licence.