All you did was prove my point.And why not? that's like saying since hashirama never died against susano he can't be killed with a kunai even though he was about to kill himself with a sword.
Izanagi isn't based on how many times danzo (or any user for that matter) dies. Its an illusion cast upon oneself, giving the user the ability to redo anything they chose to do as long as its active. For danzo each eye is active for 1 minute therefore he can redo as much as he want for the duration of said eye. 11 sharingan eyes means he can do this 11 times.
It has nothing to do with him dying.