“They say the Bible says this in so many words.”
Who is “they”? Also, please provide book, chapter and verse to back this up.
Don't know for sure, could care less, other than I realize smart people did smart things way back when and before mind control sheep herding.
Most seeds have mucho oil, hemp is just easy to grow and useful for chordage, etc..
I had a hemp shirt long ago , it was real comfy and lasted a long time.