"They" meaning who?
Big pharma has a way of distributing cheap drugs to third world countries who have large black markets for selling these goods locally. Bitcoin + anonymous networks like Tor would allow these local markets to go international (not that I would condone or approve of such a thing.)
The regulatory body in the applicable legal sphere.
Sure you can distribute medicines anonymously and get payments anonymously. Yes big pharma does shady shit but they have elite laywers on retainers fighting lawsuits constantly. And they make the drugs. Where are you going to get them from anonymously, if you aren't making them?
Plus if the dude was not aiming at distributing counterfeit male performance drugs (which are extremely dangerous) he could have done better than to chose a name like "viagracoins".