What are you saying no to? You seem to be completely repeating what I wrote.
It's not the accuracy of the Police radar, that's calibrated regularly. It's the accuracy of your car speedo. That was calibrated at the factory and are allowed to overread up to 10% but never underread. Hence if you are clocked doing 34, your speedo would be reading higher. The debate why this is, is a whole different thread.
What I'm saying is that in the UK justice system we treat some crimes as worse than others. Otherwise you end up with children doing life sentences for stealing sweets. That's the grey.
I'll repeat I don't speed as I've had serious near fatal accidents that were not my fault while driving at less than 20mph. It's just not worth it.
It worries me that people are only looking in the road for potential hazards and see that as still being safe.
There isn't a magic option of either looking at the road all the time or looking at your speedo all the time. Part of being a careful driver is being aware of all hazards and of your own speed and position. It's a pretty basic requirement for passing the test!
Things are not black and white, the law has to be written in a way to make them black and white and covers the shades of grey.
Would you get done doing 80mph on a motorway? Unlikely, it's pretty close to the +10% mph.
Would you get done doing 34mph outside a school? Again it's unlikely.
If you were what would the penalty be? 3pts and an ??80-??100 fine or offered a speed awareness course.
What if you were doing 90 or 40 in those respective situations. You would definitely get points and a fine.
What about 60 and 100? Then you're looking at a ban.
Society and hence the laws deems certain actions worse than others.
Driving whilst using a communications device borders between the second and third situations above.
So have we all driven at 34mph in a 30mph limit? Possibly in the past but not anymore for me. I've had two no fault accidents at 20mph where people nearly died. Do we drive at 40mph? Generally no but you'll see people doing it while on the phone, they're generally a list cause though... Bang them up.