In that vein, I'm reminded of the old tradition of consulting oracles to make decisions when hunting or before a battle. If we see an even number of crows we do this, else we do that, things like that. The reason this worked was because the oracle was acting as a random number generator, and being unpredictable can have advantages in such situations (a lesson from game theory).
I am unsure exactly how much of the biology was understood at the time, but it also wasn't entirely drawn out of thin air. A lot of it was just drawing a bunch of known good practices together as a cohesive design philosophy for how to run a farm.
Spirituality stuff was very in vogue at the time, so it's hard to say if it would have even gotten popular without the cosmic forces type stuff. Even if it was a dubious contribution to the actual mechanics :)
But biodynamic farming does also emphasise the kind of cohesive view of your crops as an interacting system that you'd find in modern permaculture. It's just that biodynamic implies a bunch of other spirituality stuff that you wouldn't normally consider part of permaculture.