- Disembark everyone and send them home immediately for quarantine there.

- Disembark everyone and send them to hospitals for quarantine there.

- Disembark everyone and quarantine them in smaller groups off-ship.

Basically anything other than leaving 3000 people to simmer with the virus. Isolation on the ship is so bad that if they continued the quarantine as they are doing now for another few weeks, all 3000 would basically be guaranteed to catch it.

It is just a mini https://en.m.wikipedia.org/wiki/Unit_731 it isn’t a quarantine, it is a plague ship.

Authorities didn’t know what to do, so letting everyone on the ship get infected was the second best option.

I would have setup make shift tents on a military base 25m apart and measured temp continuously and PCR once a day.

I think (hope) that's a hyperbolic comparison. Having decision paralysis, not knowing how to handle the situation and letting it get out of control, is a lot different from the depraved acts of Unit 731 where atrocities were being committed deliberately. To be properly analogous, the Japanese government would have to be deliberately making the situation on the ship worse. It's the difference between depraved maliciousness and incompetence.

Unit 731 is human experimentation, the ship is just gross political incompetence.