Are those things really an important part of “the” human experience? I'm surprised to hear psychedelics mentioned in the same sentence as such a normative prescription.
Yes, but important in the sense of them being the most salient human experiences, not important in the sense that you should do them. E.g. I’d put going to war in the same category.
I didn’t say they did. The reason I think people should try different drugs is largely that it’s not possible to fully understand the art, laws, institutions, culture, etc. of a society without having had the qualitative experiences that inspired them. The reason I think there is an obligation is the potential to have new ideas and experiences that benefit society. E.g. given the current drama around gay rights, if you can swallow a pill that gives you the qualitative experience of being gay for a couple hours then I believe that’s something you have the moral obligation to do.
"I am human, I consider nothing human alien to me."
If you're healthy enough, I think it's something that people have an obligation to society to try. It's also just an important part of the human experience, and imho going through life without ever trying psychedelics is akin to never going through school, dating, having a job, starting a family, etc.