I wish I could decisively turn off airplay on macos.

It's the source of so many weird issues.

For example, locked down mac, using wifi at a friend's house and their LG tv shows up as an airplay mirroring device. Why should my machine be discovering that TV without me asking? When I'm on a public network, I'd like to make my machine output-only, not promiscuous in this way.

there was also an issue where a macbook would randomly lose its onboard sound and somehow default to using a nearby appletv as the output device.