If our civilization is going to develop further, like traveling more into space, we have to understand spiritual matters more. If you use psychedelic drugs in the right way, you can understand the origin of religion and have primary religious experiences. This type of information is far too dangerous for the people that don't want to change the type of society and culture we live in. That is why this information is being suppressed and one of the reasons why psychedelic drugs are illegal. When people abuse drugs and not use them in a spiritual, well-meaning matter, it means it cannot be freely given to society.
If you use psychedelic drugs in the right way, you can understand what the occult and the spirit world is.
Good luck on your astral journey!