Not taking action doesn't require supporting evidence, and insickness didn't propose a framework in which it does. There is at any moment an infinite number of things you could choose to not be doing. You can't collect evidence for not doing those things, as the amount of evidence required would also be infinite.
Not taking any action is also a decision, and it has to be justified like anything else that will affect the health and lives of millions of people.
You don't need to collect evidence for everything you choose not to be doing, all you need is evidence that the status quo is not worse than any other (known) alternative.
In any case, my point was that you can't make decisions based on evidence when you are faced with a new situation for which there is no (reliable) evidence. In these cases some other approach is needed.
