BINGO! You said it exactly. We really don't need anything to see or realize the ultimate reality (often called enlightenment)--just a shift in our point of view. Check out Nisargadatta. He did not even meditate yet one day he woke up every bit as much as the Buddha (he said he focused on his sense of self for about 3 years...). Cannabis, shrooms, etc are really tools that can help us see outside of our conditioned experience. Using them wisely, with awareness, is the way to go.