Why does the US government feel that the use of illicit drugs such as cocaine and opium (morphine) should be controlled?

Question

Instructions

part 1

Why does the US government feel that the use of illicit drugs such as cocaine and opium (morphine) should be controlled? 

How do you feel about control of cocaine and opium compared to marijuana, alcohol, and tobacco?

part 2

1. How do you define psychoactive and addictive drugs?  

Follow the links below and list five drugs that the US Government identifies as the most addictive drugs.

https://www.drugabuse.gov/drugs-abuse/commonly-abused-drugs-charts

2. Why are they defined as the most addictive? Is there any one or more of them that the US Government does not seek to limit its use?