“An argument could be made that by limiting researchers to using a vastly inferior product, NIDA could all but assure that cannabis research is inhibited, and any results are compromised in favor of prohibitionists.”

Well, maybe. Seems to me prohibitionists would likely find more useful fodder if the weed was actually good enough to get test subjects truly high as fuck. What kind of ill effects can they assign to smoking bunk weed? Extreme annoyance?