Commuter cyclist represent a tiny proportion of the overall driving population.
That much is obvious. But my point, in response to your assertion that, in relation to drivers of motor vehicles:
most cyclist [...] fail to take on board the phycological changes on humans when they’re on high powered vehicles, The limited visibility and so on.
was that you got that wrong.
Most cyclists are also drivers so know exactly what a driver's abilities, limitations and responsibilities are.
You're switching the relationship around now but that's fine because you'll have to agree that since cyclists are a 'tiny proportion of the overall driving population' it follows that the vast majority of drivers are not cyclists. Therefore they are much less likely to have the first clue about the needs of people who want to commute safely by bike.
It explains why things like indicators and brake lights are misapplied to bicycles.
A non-cycling driver looks at a bike and thinks: that doesn't have indicators like all cars do, nor brake lights like all cars do. Surely if I make the bike more like a car it'll be safer?
This car centric approach is completely wrong as cycle safety needs to be seen from the perspective of the rider. And it's been said every time this nutty idea comes up, it is pointless.
Indicators may not solve all cycling related problems.
What problem do you think they
would solve? Have you researched, for example, RTC statistics to see how often lack of indicating was a contributing factor in KSIs?
I suspect your research goes no further than your own limited experience of near-misses you've witnessed and I'd be surprised if you had collated all of those and identified a lack of indicators as being a primary cause.
Some safety is better than none at all.
Wrong again.
As regards indicating a change of direction on a cycle, drivers are trained to react to - and expect to see - arm signals from cyclists. Simple, effective, free.
So here's your next problem:
Bikes and their riders can be fitted with all manner of lights; steady, pulsing, strobing, flashing, red, white, amber, worn on heads, arms, helmets, backpacks, saddlebags, panniers. seatposts. forks, crown, axles ..... Where are you going to fit a set of indicators amidst all that and how will you distinguish their function to make them clear and understandable to everyone?