End of war of drugs would just re-channel the same tactic against other targets.
The cigarette companies have been used for years for killing people. Imagine he amount of people using for ods.
Tort reform would also be need for this to ever work.
Obviously, the taxpayer is footing the bill for this, but total spending reduces (through the reduction in drug related crime).
They sell drugs because it makes money. Legalize drugs and they'll make money some other illegal and dangerous way.
There are other countries and other states in the USA that have legalized certain drugs, have they had a comparative rise in other illegal and dangerous activity like you have claimed?
Or are you just hypothesizing one possible outcome that has no evidence or bearing on reality, "whatsoever".