Most people will voluntarily adhere to cycle safety, but some can't afford it on top of other cycling costs. And hence will not cycle.
In addition to this, the age or the bicycle or rust on the frame may affect safety, so upkeep of bike is needed.
So which ones of these should be made compulsory and what is the justification for that?
Maybe we should all wear all the possible safety gear all the time and suits of bubble wrap too. How about we only bike during the sunniest hours of the day, or when there's low traffic to avoid risk.
I suspect there is almost no-one who does the above, they would rather not bike. We have to assume that those who bike accept that there is a chance of a fall,collision or accident and they might not know the probability, but are comfortable enough to go ahead.
Each person has their own risk preferences, and according will decide to equip themselves with the safety gear they are willing to wear or to cycle at all. If the government decides the minimum risk level, some people will just decide not to cycle when they would have otherwise, but there will still be accidents and deaths on the road.
Why must cycle helmets and lights be compulsory, when other safety gear not?
Everything in life has an element of risk, it should be down to the individual to make the choice to wear on not to wear safety gear and not be legislated. It would be to costly to legislate and make people comply with minimum risk for everything. There are already laws for harming someone else's person.
If we took the same attitude to pedestrians then they should also wear helmets then to prevent them having a head injury.
One of the reasons people cycle is for enjoyment. Wearing safety gear can affect that.
Head injuries are extremely rare when cycling, it's hands, elbows, shoulders and knees that get hammered, and this was borne out in research by ROSPA years ago
How about cyclists just stay off the road?
There are lots of activities where wearing a helmet might protect individuals from head injuries in the event of an accident, driving or being a passenger in a car for example. Why don't we make that compulsory? Or would the motor industry have something to say about that?
If you are going to bring in a law, should it be one size fits all?
Should the compulsory helmets apply to everywhere, or:
Does the law take account if the cyclist is safe or dangerous.
Will the law allow an opt out?
In a cycling accident your hands go down first, so gloves are the most important bit of protective clothing.
Responsibility: What we need is more responsible driving and cycling
Could the road be designed differently to reduce the need for safety gear?
Better designed road junctions.