Actually, the notion that drugs can alter your perception - including for the better - is far from crazy.
I do not question that they alter your perception. This is all what drugs are making to you, if you use them. Alter your perception (making you hallucinate things), and making you drug dependent (over time, or even immediately). But saying that the drug helped you to develop something good (other than realizing that drugs are bad, and you stop using them) is crazy.
At least this is what I currently think. I have not used any drugs so far, and I will not use drugs in the future either.