If someone uses an ability like “deal damage to both adjacent minions,” and the minion to the left has lifesteal, no lifesteal is granted when it takes damage. Why is that? Is it because the minion doesn’t “know” it got hit?
Think of it like this: If you hit a poisonous frog with your hand, you wouldn’t avoid getting poisoned just because the frog didn’t realize it was struck. The poison is on its skin, and contact is enough to transfer it.
Or consider a cactus: You’ll still get pricked if you touch it, regardless of whether the cactus “knows” you’re about to hit it. The effect happens because of inherent properties, not awareness.
What about lava? If you touch lava, it burns you instantly, regardless of whether the lava “knows” you’ve touched it. The damage is inherent to its nature and doesn’t depend on any external awareness.