>>6161455That makes sense using real world logic, but Halo universe isn't always logical. They had the Carver Findings, and Halsey ran the simulations. As the first post in the thread mentions, the best case scenario was 30 years of war and 5 billion dead - just remember that any FTL-capable transport is a weapon of mass destruction.
Halsey studied the Orion project and agreed that using supersoldiers as a scalpel to remove rebel leadership was the best option available to minimise casualties and avert disaster. The original project had flaws though, and she reasoned attempt 2 would require children. She hesitated over ethics/morals, but when the innies nuked Haven, killing millions of civilians, that was the last straw that made her commit - sacrifice some children to save billions.
Her thought process is outlined well in her journal.
