Responible research and cannabis

Ok, so I was just reading an article on the BBC website about how "cannabis disrupts brain centre" http://news.bbc.co.uk/2/hi/health/6606931.stm. Basically it tells how recent research has shown that THC in cannabis have a direct correlation with increased activity in "area of the brain called the inferior frontal cortex, which keeps inappropriate thoughts and behaviour, such as swearing and paranoia in check." This is contrasted by the substance cannabidiol (CBD), which has the opposite effect of dampening the potential for psychotic symptoms.
So far so good right? Well here is where we run into a problem. The BBC sites rises in the THC content in cannabis in recent years, going from 6% to 12%. This has the affect of canceling out any positive benefits from CBD. So ok, fair enough. It seems like there has been enough research done to back up this conclusion. The report in itself doesn't bother me so much as an analogy that is drawn at the very end.

Professor Murray also warned that the high potency cannabis now widely available was likely to pose a much bigger risk to health than the significantly weaker formulations of previous years.

"It is similar to comparing the effect of drinking a glass of wine at the weekend with drinking a bottle of vodka every day."

Is that really appropriate? I have seen a person who drinks a liter of booze a day and I know plenty of people who smoke the 'new potent pot' regularly. I have to say that makes no sense to me if the goal is to compare the effects of smoking pot 15 years ago with smoking pot today. It makes perfect sense if the goal is to distort scientific findings and scare people. Just think for a second, a glass of wine = 100 ml total with about 10g of pure alcohol. A bottle of vodka = 1000 ml total with about 330g of pure alcohol. So right there 330/10 is 33 times the alcohol. but we aren't done yet. Notice its a glass of wine once a week compared to a bottle of vodka everyday, so lets just multiple 330 by 7 to get 2310. Now lets divide 2310/10 and we get 231. So, according to the professor interview by the BBC the rough doubling in THC content in cannabis over that past couple decades is similar to upping a once week drink 231 times. (By the way I got all my drinking statistics from the good people at www.alcohol.org.nz)

This concern about rising levels of THC in cannabis have been echoed elsewhere in the media in recently, most notably and predictably on Fox news. It is certainly something to be studied and examined, but without the filter of rhetoric that almost always surrounds the issue. I think people can handle the truth on this issue and make a reasonable decision for themselves without facts being misrepresented, don't you agrees?