Most of the time this prompt comes up it's actually for a genuine purpose, like spotify trying to find devices on the local network that can play audio, VLC looking for chromecasts, I saw my DJ app ask for local network and discovered it can discover my decks on the network and stream my library over the local network to it.

The problem is this prompt is new so the software doesn't show the user why it's just triggered the prompt and the user has no info to work with.