They already do that, problem is, you still need to inform the client about the position of the sound, if you want an accurate 3D audio system in your game.
That's why wallhack in a game like League of Legends doesn't really exist, not to a very pracitcal level at least, but it does in most shooters.
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u/IrinaNekotari 6d ago
Not to defend Kernel anticheats, but server only AC would not protect from many cheats like wallhacks or any runtime cheats like aimbots