The fate of those who aren't successfully adapted is death, and even those who succeed only end up delaying their demise, because once the T-S within them is extracted, the living body will die, and each body's extracted T-S can only supply the needs of one other body.
After injecting the adapted T-S, the extension of life for these individuals entirely depends on the body's physical condition, but it's entirely possible to inject new T-S before the T-S active in the body diminishes, allowing life extension to continue; this cycle is as addictive as a drug.
The addiction to the word 'living' for these people, once it flares up, demands the lives of hundreds or thousands to quell it without the slightest burden.
Because they have long since gone mad, devoid of conscience and humanity.
