Even moldy cannabis is still sellable weed. The expression "send it to blast" is meant "if it's shitty ass garbage, let's turn it into concentrates."
There's a company called Willow Industries that remediates moldy cannabis as their business. They use ozone to blast the buds in trays in these huge boxes that look like an oven. There's another company here that uses peroxide in a vacuum to clean buds.
Moldy bologna? Just scrape that shit off and make a sandwich!
All your distillates, your shatters, your waxes, etc etc, are QUITE LIKELY made from some of the most garbage material you've ever seen. And for those that think those solvents are killing everything in there; I've seen concentrates posted by budtenders here in Colorado having molded out (under certain conditions.)