Well, he's right about that Thais need more education about Cannabis, Hemp, THC, CBD etc....
But you don't need research about it, especially in Thailand. Plenty of studies from abroad available to make up your own opinion.
What he also got partly right, is the comparison with opium and heroin.
When I was in south America, I chewed coca leaves against altitude sickness and fatigue. Nothing wrong about that but the same plant can be used to make addictive cocaine.