@Eli19852
I am afraid that Airbnb's extenuating circumstances policy no longer applies to bookings made after mid March 2020. The reasoning for this is that, since then, everyone knows that there is a pandemic and that government restrictions might change or other COVID related issues could get in the way of the trip. Therefore, you booked that trip knowing that it might be affected in future.
Yes, you could say it was beyond your control, but it was within your control to book a trip during a pandemic and the host's cancellation policy is available for you to see on the listing before you book. You agree to this as a contract when you book. To then cancel four days before and expect the host to cover that considering it's probably far too late for them to get the nights rebooked isn't really fair. You took the risk. No one forced you to.
Sorry to sound unsympathetic, but from a guest's perspective, I would consider all of these things before booking and not hold my host accountable. You say it's beyond your control, but it is also beyond the host's control. Did you pay the host to provide an insurance policy for you? Erm, no. So why would you expect them to act as your travel insurer?