That's all fine and dandy until the moment where you self-medicate, take your car, faint at the wheel and kill a family of four.
To give an example: in my country, 56% of people have already medicated with homeopathy (a known scam for decades). Imagine if they could just buy any other medication, which unlike homeopathy, could have strong secondary effects ? Those 56% people who have "illnesses" with very benign symptoms that for most cases cures itself in a couple days without any drugs (homeopathy is used for anything, common cold, headaches, itches, you name it ...), now they're potentially taking much more dangerous meds. So it's clearly not equivalent as 56% of people definitely don't have "faint-at-the-wheel" symptoms today.