The methodology may have some holes - but it’s surely a very good start. The strictest in the known world. It’s very easy to criticise.
I can’t agree it’s the strictest. The US has banned travellers from Europe full stop. Italy has 16 million people in lockdown. Etc.
I'm with you. India has cancled non-nationals entry Visa's. Philipines is blocking non nationals (excluding spouses and kids) from about 60 countries.
Our pritty please, self isolate yourself, bit it is ok to take mutiple domestic flights firs is a relaxed approach in comparison.
That said, mass flight cancellations may function as an effective full ban.