In the long run, we're all dead. Or perhaps just cured of covid.
There's ~375k Chinese students in the US. At one flight a week, it would take over 20 years for all to return home (to be fair, there's actually 4 flights a week I believe -- so merely 5 years). This is a de-facto blocking of citizens from returning.
And no, you can't just "wait" a month. As a sibling commenter noted, the best they could find were October tickets.