I'm against drug prohibition in general. I think it has been an abject failure. Strong regulation makes sense for the most dangerous drugs (cannabis certainly isn't one of them), but I don't think any drug should be illegal. I don't believe it's the government's job to save you from yourself.
Making a habit of driving 100mph on a motorcycle will probably kill you about as quickly on average as either of those drugs, and is more dangerous to other people to boot. Should motorcycles therefore also be illegal? If not, why not? If the goal is to stop people from hurting themselves, why are you only focused on one particular way that people can hurt themselves?
We have laws preventing 100mpg speeds on any vehicle. We also have laws that govern how a motorcycle should be driven.
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.
A law against 100mph speeds on a vehicle is not a corollary to drug prohibition--it's banning the use of vehicles completely.
"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."
Considering that cannabis kills exactly no one, you seem to be arguing against your own point here.
Making a habit of driving 100mph on a motorcycle will probably kill you about as quickly on average as either of those drugs, and is more dangerous to other people to boot. Should motorcycles therefore also be illegal? If not, why not? If the goal is to stop people from hurting themselves, why are you only focused on one particular way that people can hurt themselves?