AA im sure you can see the whole reason why DFO is doing what it is doing is based on the PSF and the SSHI results.
https://www.psf.ca/what-we-do/strategic-salmon-health-initiative
Hence the testing for HSMI and jaundice in fish farmed fish and testing for the two types of PRV. They will also be "We are going to require testing (in hatcheries) for both of those strains because we are concerned about them".
Eradicating the native form of PRV or the form that PRV that's now everywhere including in rockfish and types of fish would be difficult. If fish farms were the cause, or other introductions or contamination caused it to be here. Well that ship has now sailed and its here. The industry is already on the path to close containment.
Fish farms are also being moved off of salmon migration areas and also need first nation approval.