The medical benefits of marijuana are well know today. It can help people live a better life in many cases. But, as with the incredibly stupid blood prohibition of the incurably ignorant borg, jw's will be prohibited from it's beneficial use due to archaic thinking.
But as with blood, I do believe that jw's can accept marijuana fractions! So if the current medical benefits "overlap" the old 'getting high' benefits, it's a matter of conscience! Or something like that.
just saying!