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."