@Bronwen3 Yes, if you reasonably want to have more control over the booking process, deactivating Instant Book is the most logical thing to do. And I also agree, and have always said, that the EC policy is a poor substitute for travelers insurance.
On the other hand, unilaterally banning over a billion people based on a single experience with Airbnb is a self defeating move in many ways, especially since you just advertised in a very public forum that you might intend to practice ethnic discrimination (which can get you permanently delisted).
And also, a short term profit loss seems like a petty concern compared to the overarching goal of containing a potential global pandemic. If Airbnb weren't granting refunds to people banned from traveling due to a lethal outbreak, the bad press would hurt them a lot more than your predicament.