If it takes mind altering substances to become creative, you're not creative.
And you certainly aren't smart.
Ever wonder why you think you have "the most incredible ideas" and realizations when you're stoned out of your mind?
I bet you think you are walking into a forbidden portal that leads to higher levels of cognition?
No, you're not visiting another supernatural dimension, you're experiencing psychosis.
The real genius comes from being able to get creative and have "ah-hah" moments without taking a toke or a sip.