Also, isn't hemp-derived CBD more or less inert? My understanding is that there's some evidence for positive psychological effects from cannabis-derived CBD but not for hemp-derived.
Honestly the science on this isn't in because the funding has never been available.
(it's also totally orthogonal to my claim.)
There are some questions around whether the “entourage effect” is beneficial with CBD. In other words, does the presence of THC and various other compounds make CBD oil more effective for x or y (vs pure isolates of just CBD).
But “industrial hemp” really just means cannabis with a THC content below a federally determined guideline. And that’s why it needs to be tested for being “hot”. Many people lose their crops because they test hot and find themselves with smokable weed.