I think it's OK say that Marijuana should be legal but acknowledge that the concrete proven medical benefits attributed to it are pretty marginal.
My take too. It has not followed anywhere near a normal process for a medically safe/effective drug to be approved. I'm for it being completely legalized but the medical aspect is very weird. The DEA has not helped this at all but MJ is basically legal at the state level(s) because activists successfully argued against the war on drugs and via political will. Not because MJ treatments have been proven scientifically…
There are also people who are certain that access to medical marijuana saved their lives. The example that comes to mind was someone who was dealing with significant nausea / appetite issues that had caused dangerous weight loss that no other prescription medications could manage. Medical marijuana ameliorated these issues when nothing else had.
This doesn't mean MJ is a miracle drug, but it does meam that there is a significant group that quite genuinely supports medical marijuana for medical reasons.