The point is "a warning" is not enough to communicate to people the gravity of what they are doing.
It is not enough to write "be careful" on a bag you get from a pharmacy... certain medications require you to both have a prescription, and also to have a conversation with a pharmacist because of how dangerous the decisions the consumer makes can be.
Normal human beings can be very dumb. It's entirely reasonable to expect society to try to protect them at some level.
The point is "a warning" is not enough to communicate to people the gravity of what they are doing.
It is not enough to write "be careful" on a bag you get from a pharmacy... certain medications require you to both have a prescription, and also to have a conversation with a pharmacist because of how dangerous the decisions the consumer makes can be.
Normal human beings can be very dumb. It's entirely reasonable to expect society to try to protect them at some level.