Because, 'Eternal Ian' and other non-eternal entities can never coexist as equals, like a player of a game who can never regard game characters as real as the people in reality... even if he loves, hates, admires, or detests them, once the next cycle of reincarnation begins, everything will start anew.
And everyone will be reset.
If each life isn't regarded as real, perceived as a journey through the game and reincarnation, everything will turn into meaningless nihility.
At that point, if Ian makes the most wicked and brutal choice, it would likely be akin to a player collecting all CGs and achievement trophies in a game, uttering apologies with their mouth while feeling no disturbance inside, perhaps even a hint of joy.
—I've reached places never touched, arrived at futures never traversed.
