In other words, it is nearly impossible to accidentally kill yourself via overdose on psychedelics - but somewhat easy with alcohol.
I can’t handle drugs (as much as I’m curious about them) but I had a “smoked waaaay too much pot”experience in college where I was high for almost 24 hours and I spent the first six hours or so convinced I had broken my brain and was going to die.
That said, even after reading wikipedia's source on the ld50 of lsd, I remain unconvinced that there even is a lethal dose of LSD.
"Eight individuals who accidentally consumed a very high dose of LSD intranasally (mistaking it for cocaine) had plasma levels of 1000–7000 μg per 100mL blood plasma and suffered from comatose states, hyperthermia, vomiting, light gastric bleeding, and respiratory problems. However, all survived with hospital treatment and without residual effects."
https://maps.org/research-archive/w3pb/2008/2008_Passie_2306...
In short, even on the rare occasion when people have taken 1000x what they should, they didn't die.