depends what you think reality is. if you assume every hallucination is reality then yeah our perception is limited.
“Hallucination” is a word used by people who are afraid to test the boundaries of perception. Plant medicines should not be discounted so easily.
“A hallucination is a perception in the absence of external stimulus that has qualities of real perception.” Also includes things that that cannot be reliably repeated & tested.
If you throw out objectivity (ie repeatably testable), reality can be whatever you want it be (eg inedia). undermining the concept of reality.
