Australian Open Quarantine

Australia is one of the countries that controlled the COVID crisis the best. As of today, January 19, 2021, Australia has around 28,000 cases and they have an average of 10 new cases per day. These numbers are extremely low considering how easily and how fast the virus spreads. But, how did they achieve this? To be honest, I don’t know, at least completely. But I do know some of the restrictions they impose. For example, in the sports world, 72 Australian Open players are in full lockdown. This is because they had some type of contact with a person that had the Coronavirus.
Some of the players that are in complete lockdown are Uruguayan Pablo Cuevas, 17-year-old Carlos Alcaraz, Coco Gauff, and many more. Some concerns have been raised by players saying that not training will significantly affect their performance at the Australian Open.
What is your opinion? Should the Australian Open organizers be this strict? Or should they at least let the players out to practice? Truth is, it is very unlikely that all of them are positive for COVID, and although the tests are not 100% correct all the time, PCR tests can give pretty accurate results; however, the tournament would still have some risk of taking irresponsible behavior if any of the players turn out to be positive for COVID.