The government can't ban everything that has a risk of death. You could die if a tree falls on you randomly. The government isn't going to ban trees. It has to do with the magnitude of the problem to society. Motorcyclists getting killed, although a problem, is not that high of a problem to society in the US.

Are you a software developer or work in tech? There are millions of things you can do to improve your product but you always prioritize the most important ones first, right? Best bang for the buck. And you'll likely never reach the improvements at the bottom of the list.