Having ridden push bikes and motorbikes and driven cars and lorries through London for years, as well as overseas, I think it is of huge benefit for any driver to have ridden a biike.
Yes, there are irresponsible and foolish riders but the same can be said for drivers, so my driving philosophy, having retired from biking, is to treat every road user as being totally unpredictable.
Riders are extremely vulnerable, and exposed to depressed drains and other road faults which drivers don't notice so I give them a wide margin of safety.
We all think we are good drivers and to be called a bad driver is akin to being called a racist or paedophile . I don't claim to be a good driver, bit I think I am an improving driver, even with over 50 years on the road.
So if you are a driver give cyclists as much clearance as possible, and if you are a cyclist treat all drivers as half blind, cocooned, unthinking morons. Your life depends on it.
Cheers.
D (Inst. Advanced Motorists, RoSPA Silver