Anyone who lets a car get away from them to the tune of 30mph above the limit clearly lacks the wit to be driving. Drivers don’t accidentally bust a limit by 43%, that’s simply negligence or incompetence.
I too have owned fast bikes and cars. One or two cars were very, very quick indeed on the track (0-60 3.2 secs with a top speed of 190 mph) and not once did I ever mishandle it to the degree you describe.
This ‘defence’ sounds an awful lot like one of my neighbours who has lost his licence three times through totting up. It’s never his fault though, always someone/thing else.