Just want to point out that if you still live in that 'survival of the fittest, nature hates us all, the world is a physical meaningless bunch of stars and shit, everything is reducible to mechanics' worldview you're still living in 1900, and also you must be pretty unimaginative, uninspired and potentially depressed.
There are alkaloids in nature that affect particular receptors in the brain because nature grows as a whole and everything implies everything else. If over here you have 5HT2A receptors, then over there you have alkaloids that bind to it. The psychedelic experience is part of the natural functioning of the human organism.
The other attitude is, fuck no, it's all a big mistake, fuck you and any meaning you think there is I'm just here for the hedonism.
A completely immature and unintelligent opinion that is obviously too simple except to stupid people.