No it's not.
Physics applies equally to people driving safely for their own personal enjoyment and people driving to save a life - unless you've found a magical way that the possession of blue lights somehow makes a driver infallible and immune from the effects of making a mistake when under "blue mist"? Please, let me know.
Firstly, people driving for their own enjoyment and people driving to save a life have different stakes.
If the former is slowed down, someone is a bit late home.
If the latter is slowed down, it's likely someone will experience significant delays to their medical treatment, which can sadly lead to death
Therefore, the safety implications of an ambulance driver speeding could be considered to be outweighed by the urgency of their duty, while the safety implications of someone driving for another purpose could not.
In addition, please go back and read these paragraphs which i wrote, particularly the bits in bold:
Ambulance drivers for example are highly trained in the safety of driving at speed and there is the societal understanding that an ambulance on blue lights is performing an extremely important duty and they are the priority on the roads; this is why car drivers are seen changing lane or even mounting the kerb to allow an ambulance to pass along a busy street.
Private drivers on the other hand take a few lessons, and could have had no experience of handling any kind of vehicle on the road beforehand. They then sit a couple of tests and they're good to go, and will probably never even consider retaking any kind of course on it for the rest of their life, excluding a court order to do so or the somewhat unlikely scenario that they apply for a driving-centric job which requires additional training, such as HGV driving.
A single carriageway road where I used to live was good for a safe 80mph
But was it really?
Imagine a pedestrian trying to cross that road, or even walking along it.
Clearly I don't know the exact scenario, but I
do know of many roads which are perfectly safe for 80mph in a car but can't be 80mph because it would pose a hazard to other road users.
It's not just about cars, you know.