Puzzled. Perhaps only my own experience but prior to becoming an Airbnb Host I was in the travel industry (air carrier) where if I made a hotel cancellation, typically within a 24 hours of arrival I could expect a full refund, and if not full, a small service fee.
Seeing all the host complaints because they adopted a "Strict" refund policy, and now that we're in a pandemic, which I'm sure was never anticipate by hosts or Airbnb, they lose their ability to still have guests just toss away their money, as non-refundable. It's purely my own opinion but feel that view is short sighted, since because of your being rigid, and wishing to only apply the "strict" policy, "under all circumstances, that include a global pandemic", will possibly gain you income today but lose it tomorrow. Yes some may switch from "strict" to something else in the future, but some folks will remember.
I blocked my own calendar last week, for a three month period and will either open or close more time depending on what information we get regarding the Coronavirus. What prompted me was a cancellation that occurred days before arrival, because of their concerns about the virus. This was prior to the Airbnb virus change policy.
I don't want to have my Airbnb be known as responsible to contributing to effects of the virus, and having to close it permanently because of a bad reputation, nor do I want to be responsible for possibly spreading it, if a contaminated guest visits mine, making me a carrier.
And yes, it will definitely have a financial impact on me, and every other host, especially those who practice hosting as a sole revenue source. Yet, it will eventually pass, and I would prefer to plan ahead long term. Perhaps Airbnb or insurance industry can come up with an insurance policy to cover such issue we are currently experiencing.