My god! How do you relax bob?
Really though you have a point in the sense that most advocates of drug legalization a person meets in everyday life are drug users. Now as a drug user myself I'd have no problem taking their views on board (actually, I think they probably know more than many who've never touched the stuff) but to many people this is an issue.
I suppose people who see drug use in terms of addiction and all that see about as much sense in taking a dope smokers views on board as they do taking to an alcoholic about drink licensing laws.
This is a shame. To kickstart a reasonable debate a reputable media organ (or even better, mainstream politician) should come out and say that our drugs policy isn't working and needs a comprehensive obverhaul. Perhaps it will happen in time. I don't think it will take 50 years but maybe another ten or 15. Thats going to be a lot of money wasted all the same though.