Discord only requires this for sharing audio along with screen sharing - I've shared my screen with the Discord app several times before without audio and I've

Discord only requires this for sharing audio along with screen sharing - I've shared my screen with the Discord app several times before without audio and I've never installed the kext. And, at any rate, the kext they want you to install is the same one Rogue Amoeba uses for their well known and widely used app, Audio Hijack. Discord licenses it from them; they mention it in the dialogue that prompts you to install it.