Refer to what I said previously, people have survived such injuries in the real world, there are people who only have half a brain.
The same old man with cancer that took an entire sword through his heart and shrugged it off like nothing? That alone is a fatal injury that he shrugged off, he took it and then also went on to take hundreds of other attacks.
[automerge]1708798673[/automerge]
267 sword wounds
152 bullet wounds
46 cannon wounds
That would kill a normal person a thousand times over, but apparently an injury which real world people can survive would've killed Whitebeard