Well of course it's a hoax anyway, but it might not be all about the transiting boater. Say a person in Village A has COVID. A boater comes in contact with that person (either intentionally, or if it were you, unintentionally). Then they end up stopping in Village C (medical issue of senior citizen boater, say, or unforeseen boat issue).
Say the chance is one in 100,000. Why should they take that chance? What do they gain by the boater coming through?
Another concern: What if someone were to fib about the two weeks. Not you, but another boater who considered the whole thing to just be over-reacting. That person might scoff at masks, be asymptomatic, and then... COVID is a cat you can't easily put back in the bag, and they gain nothing from taking a chance with pleasure boaters. It's not like they are going to be making money off of through boaters stopping at their many resorts (that don't exist), so they have nothing to gain and everything to lose, IMO.
I'm sympathetic in that I had planned to be boating in leisurely fashion up the Inside Passage last year (tame compared to you, but we are not all that advanced). Am I bummed that I can't do that last year -- or this year? Yes. Do I blame them? Not one bit. Smart them, I say. I'll go back when I'm welcome.