Here's why:
* Skull Strength: The human skull is surprisingly strong, designed to protect the brain. It's made of thick bone and is reinforced by sutures (joints) that lock the bones together.
* Force Required: Crushing a skull would require an immense amount of force, far exceeding the normal strength of a human hand. Even a powerful punch might fracture the skull, but not crush it completely.
* Real-World Examples: In cases of severe blunt force trauma, like car accidents, it's more common to see skull fractures and brain injuries than complete crushing.
Important Note: While unlikely, it's not impossible. In rare and extreme circumstances, with specific angles of impact and incredible force, a skull could potentially be crushed. However, this is an extremely rare and highly dangerous scenario.
Focus on Safety: It's crucial to understand that attempting to crush a skull is incredibly dangerous and could result in serious injury or death.