Excuse the pun but it's a no brainer...
There are accidents and fatalities, but there are also considerable cost benefits and ergo mortality decrease based on this.
Considering the amount of people cycling has decreased by 50% since the law was passed in 1994, looking at population growth you can extrapolate this out to 2487 people may have passed unnecessarily as a consequence. That is a horrific price to pay for a poor emotive law.
Before the trolls hit, I cycle, and I wear a helmet. This should not be the determinate to activity and ongoing health benefits.