Can I also claim that taking LSD is a necessity for me to have my well being? Who decides what is a necessity and what is not? I would say that the harm rate c

Can I also claim that taking LSD is a necessity for me to have my well being? Who decides what is a necessity and what is not? I would say that the harm rate could be a good indicator what a society should tolerate and anything that is less harmful what is tolerated should be legal.