Depends on the highway. Hundreds of thousands, if not millions of people drive 100MPH or more every week on the Autobahn, and Germany's highway fatality rate is lower than that in the US.
100MPH on in the rain on a crowded 2-lane road with a 50MPH speed limit? Really dangerous.
100MPH on a clear day on a multi-lane highway where the average driver in the middle lane is going 80MPH or more? Not a problem.
Posting to undo moderation that went wrong.
This! Know when (not) to speed.
When I drive my Yamaha XT 600 on the highway, I won't go above 120km/h as it gets unstable (speed limit around here is 130km/h). I've driven my Triumph Sprint ST 2005 at over 200km/h and had no problem whatsoever, provided the autobahn was more or less clear of traffic (like, early sunday morning), or on a circuit.
Also, as someone else posted, tests for the driving license tend to be serious enough in these parts (western Europe), especially for the motorbike.
As to distracted driving, it suffices to look around even on a short commute - you'll pretty much see someone with their portable phone glued to their ear or doing something else rather than concentrate on their driving. It's a wonder there aren't even more accidents. But, as the germans say: if someone called out: "Lord, let it rain brains", and the Lord actually went with it, that kind of people still would use their umbrellas...