what's valuable about them is they let you revisit your foundations and rebuild but most people just build more bullcrap
dmt is especially interesting though, it does seem to really put you in contact with some kind of external thing... like, the descriptions of angels in some places in the Bible match some of the things i've seen and heard others describe
i think the problem can be that the things are not always looking out for us, if you know what i mean... sometimes they are bad things
i am convinced they show you something from somewhere else, so to speak, just not convinced about the love and light spiritual woo bullcrap that people bring to it