No worthwhile life can be lived without risks, despite current American superstitions to the contrary.
There are two specific objections to use of psychedelic drugs.First,use of these drugs may be dangerous.Howev er,every worth-while exploration is dangerous-climb ing mountains,testi ng aircraft,rocket ing into outer space,or collecting botanical specimens in jungles.But if you value knowledge & the actual delight of exploration more than mere duration of uneventful life,you are willing to take the risks.
The world is in an extremely dangerous situation, and serious diseases often require the risk of a dangerous cure like the Pasteur serum for rabies.