"...Being an expert in bike mechanics is irrelevant. Being an expert rider counts. Control at 125 on his bike is not a big problem...."
Agreed. There are people out there who're dangerous at 25 mph. I've driven as much as 75 miles without ever seeing another vehicle in a very rural area with farms of several thousand acres. There are straightaways of 4 or five miles of nothing but open and vacant fields . Not a lot of potential danger.
You say that after the fact. There is no way of knowing this before the fact!