The last quote is particularly germane. Perhaps the modern war on drugs might have been started with political funding by industries that didn't want to compete with things like weed and coke, but it went forward and got to the point it is today because the societal influence and control exerted by government absolutely relies upon the absence of philosophical exploration.
The existence of government cannot survive scrutiny and rational examination, and so government will always strenuously resist anything that encourages such activities.