Even if they were selling, I would think it's a net loss for society that they cannot fully participate in banking.

My point was more about OP's presentation of why they could not participate. It's pretty clear they're an edge case in an edge case industry -- I cannot judge a large company being risk averse when there is no incentive for them to take on the risk.

(That said, if anyone solves cannabis banking, they are going to be a unicorn.)