But wouldn't all the Dharma people and the Others die?
Some of them did leave via sub, but the rest of them would be exposed to nuclear holocaust!
Did Jack even think about that, or does he care only about the 815'ers?
I mean, sure, there were 324 passengers who would be saved, but that could maybe cause more dead or radiated people. From an utilitarian point of view, that doesn't work.
It's just a horrible plan. A better plan would have been to kill Radzinsky.