Well, we could, but would that be fair ??
How many of the pot smokers are using it as a TRUE medicinal healing process ?? Now, how many are JUST saying they are using it for medicinal purposes, but aren't ??
See, there is no stipulation of what or how you administer this stuff, just that any of these things get into your body by your own hand..... or a doctor/care giver.
Therefore, the question/statement is still the same. You are ingesting these things, taking them into your bloodstream in one form or another. Buzzed, drunk as a skunk, highly high, medicated beyond recognition and all the other forms.... you're still impaired and might not make the correct decisions when concerning others welfare. Now, you are stepping on my toes and rights and freedom to live my way.
Things in which we disagree with each other do not play a part in this, as we are (or so we think) not under any influence(s), but this after work and party attitude of doing these things in public or taking it into the public out of your control are not cool. Discussing it is smart, but for the last 100 years or more, discussing has not done anything but legally bring it all into the public, whether we like it or not. Then y'all say, well we can tax it and make money on it. Yeah, right..... cut me a break. Buncha people who don't know how to act are taking charge of our well-being if on the sidewalks, an automobile or just standing in the park, minding your own business.