Riding a bike helmeted or not is a lot like Russian roulette with or without the same helmet. Except the gun can hold millions of bullets and a few hundred spaces will be full of a bit of gravel that'll get stuck in your head if you choose not to wear a helmet, and the helmet is obviously useless against the actual bullet, and if holding the gun to your head was really good for you. Perfect analogy.
Riding a bike helmeted or not is a lot like Russian roulette with or without the same helmet. Except the gun can hold millions of bullets and a few hundred spaces will be full of a bit of gravel that'll get stuck in your head if you choose not to wear a helmet, and the helmet is obviously useless against the actual bullet, and if holding the gun to your head was really good for you. Perfect analogy.