What are you talking about? What the hell has worm castings got to do with mold? High rh gives you botrytis.
Three conditions for any disease. Pathogen (botrytis), environment (high relative humidity), and susceptible host plant (cannabis).
For the host plant to be susceptible, it needs to be wounded, so the fungal spores and grow into the active tissue. Spraying the plant with casting tea will reduce the number of botrytis infections because other non-necrotrophic organisms will fill in the space the botrytis otherwise would thrive in.
Just one example of what introducing beneficial microorganisms by way of aerated casting teas.