This morning I decided to depress myself by checking our booked holiday destinations for the rest of the year. A fairly wide geographic and (dare I say) cultural and economic spread. I really didn’t see any prospect of restrictions being relaxed, although I certainly agree with the OP’s perspective on Tourism-dependent nations. But equally, how robust are their medical facilities, with the risk of them being overwhelmed if visitors exacerbate their local problems?

Malta ... airport closed to commercial flights. 14-day Q on arrival by other means. Flights in May imminently CNX anyway.
USA ... travel ban from, inter alia, UK and Schengen. Escalating rates suggest nothing relaxed soon!
Antigua ... airport closed to commercial flights. Overnight curfew, etc. 14-day Q on arrival by other means. How long can they cope without Tourism?
South Africa ... from UK POV, no entry. Airspace and Borders closed. Maybe by December if we're lucky.

Keeping Calm, even if not currently Carrying On! 😎