It is a bit ironic that Peter Thiel is backing Palantir, and is the biggest investor in the marijuana trade. They seem like opposite ends of the spectrum.
Maybe in light of growing inequality and youth unemployment marijuana is seen as one of the diversion tools to prevent the poor from taking political action. Especially because it has roughly the intended effects, when used regularly. Note that it is not entirely out of the question that people in power think that way, for example the 60-70's were perceived as a "Crisis of Democracy" in parts of the establishment.