It's easy to dismiss any insights while gained in an altered state as "crazy". But there might be more going on.

Drugs seem to make people naturally more philosophic; they shake you from your regular framework, which might be what people need in order to grasp the truth from a new direction.

But of course, drug use comes with its own risks. I've seen too many people whose wires have crossed after taking a few too many magic mushrooms. Use at your own risk.