@Voice @iska

I'm not too sure on how genshin's reward system works but I assume it's the same as any other gacha game. Their business model is dependent on skin/characters/items/etc being of limited time avaliability and rarity. By using a side application you can either manipulate code to change odds of you winning an item or send a fraudulent API call to their servers to say you purchased whatever boost item they sell without actually purchasing it.

To prevent this developers require the installation of a kernel-level driver that monitors all processes on your computer to stop you from manipulating the game.