Why should they be interested? We know how SARS type viruses can spread to humans, we know what other species are vulnerable, and we know what things make it more or less likely. A new outbreak was not a surprising result. What benefit is there to aggressively investigating the exact transmission method?
If your mink idea was found to be accurate, would you advocate closing mink farms? It being the source this time doesn't make it likely to cause the next transferrable virus.