People in source countries who couldn't work for 1 year won't travel right away. They need to recover losses. Not many will travel too far initially as there is no confidence that borders will remain open. Will take probably 6 months or more to build that confidence Only Chinese will come, if China allows them to leave. Many other destinations available..
According to Bloomberg, the Thai economy suffered a 6% decline in GDP - hard to believe that when tourism accounts for 18% of GDP and declined about 70% (Jan and Feb were fairly normal and domestic travel did happen to some degree). The rest of the economy must be in great shape Would be interesting to see the real loss in economic output. I can't see retail, real estate selling condos to foreigners, construction doing well either.