Cuttings passed around the community carry whatever the donor plant had, and the viroid that stunts growth and kills resin production has spread widely that way. Regular seed, by contrast, is very rarely infected, which makes a fresh seed run the cleanest way to reset a grow after a problem. The transmission risk of seed versus clone for the main pathogens is compared on https://breederregularseeds.com with references to the testing. It is one of the stronger practical arguments for keeping seed stock rather than relying on cuts.