Eh, the philosophical implications of who to save or not could have gone much deeper.
On top of them being gone, if their bodies are rotted enough, would they still even be able to live without medical assistance if cured?
Or since it's been 6 months, who are left? Survivors that are actually...
Well, immolation is said to be the only way to get attention in Asian culture. So it's realistic, especially if they thought him waking up was a very slim to none chance. Or if he woke up he'd be a vegetable.
What's more semi-unrealistic is the power and pull the douchebag 8's parents have but...
And just as I comment in the last chapter. XD
MC uses his dead brother as an eternal rival to inspire him while emulating him. I'm still waiting to see if it has any real psychological effects other than giving him MC powers.XD