The average adult can be quickly and reliably trained to use bleach appropriately: "Should I drink bleach? No. Always no."

On the other hand, the average adult requires six or more years of education and training to manage warfarin appropriately.

I'm being somewhat glib for effect, but do you not see a critical distinction there?

In the interest of public health, we make all kinds of laws to protect people from things they cannot be expected to do safely. Why is it unreasonable to protect people from dangerous medications?