What is the importance of sacrificing oneself to protect your core during teamfights?

The importance of sacrificing oneself to protect your core during team fights lies in ensuring the survival of your primary damage dealer, allowing them to continue dealing sustained damage and carry the game. The core hero, typically a marksman or mage, is the primary source of damage for the team and is essential for winning team fights and securing objectives. If the core hero is eliminated early in a team fight, the team's damage output will be significantly reduced, making it much more difficult to win the fight. Sacrificing oneself, typically by a tank or support hero, can prevent the enemy from focusing and eliminating the core hero, allowing them to stay alive and deal damage. This can involve using crowd control abilities to disrupt enemy engages, body-blocking skillshots, or simply absorbing damage to protect the core hero. This is most effective when the sacrifice allows the core to deal substantially more damage. If the core is killed anyway despite your sacrifice, it may not be worth it. It's better to trade multiple deaths for the core living than throw away lives to stall a death.