Each year in the United States, 2.9 million people are injured in car accidents. Of that number over 42,000 are killed, about 0.00001% of the population. Of those killed, 3000 were killed by drunk drivers. It can be safely assumed that the vast majority of these incidents were caused by people who broke the rules, either exceeding safe speeds or driving under the influence.
There are 16,000 people murdered in the United States or 0.00004% of the population. Murder is against the law. Over 43,000 die of drug overdoses each year or 0.0001%. Overdosing on drugs is a consequence of the lack of self-control or self-governance.
The total of the above deaths is 101,000 out of a total population now approaching or even exceeding 400 million because the government cannot count us all. That is 0.0003 % of the total population or if you believe the government census of 325 million 0.00031%.
Europe, where drugs for the most part are legal, experienced 8400 deaths out of a population of over 738 million or 0.00001%.
In the first place, the government has no authority (power) to ban or even control the trade in opioids or marijuana for the matter. In the second place, it has no authority to force me through taxes to pay for the rehabilitation of people who cannot or will not control their own habits to the detriment of themselves and those who might be their unwitting victims.
In a world of over 8 billion, there are always going to be a very small minority who defy the rules because most of them cannot be enforced except through self-control. The lives of the rest of us should not be impacted in any way by this miniscule number.