Because I'm tired of arguing with nerds talking theory over matters that ultimately are experiential, I'll say the following two points and I don't mind being downvoted.
1) Whomever says the experiences of meditation are akin to those of psychedelics is plainly full of shit. I've done psychedelics for about 4 years, and western ceremonial magic which involved plenty of meditation daily and consistently for about a decade. Apples and oranges. And thats including all the freaky spectacular shit I've experienced.
2) Practically, how much of "all that exists in the unknown" you think you will or can experience living a basic run of the mill western life in a human body? As I said, ingest 5 dried gramms, then come to talk to me about what will get trumped in your realm of experience. Until then, its only thinking you understand sex because you read dirty magazines, only for something that is several orders of magnitudes out there.