It's this rule of law thing that used to be the hallmark of the English speaking world - the body of law passed by the legislature and faithfully executed by the executive. Arbitrary and capricious actions are not rule of law.
They went after Djokovic because he was unvaccinated and did not believe in vaccination.
They are not controlling borders for the sake of global economics anyway and Omicron spread is all about porous borders.
How ironic that Israel gets the Omicron and Iran sits without it because Israel participates in the global economic system and Iran is locked out.