In some cases, they might be looking for unsecure devices.. but really I think the main use case for LG is to identify the devices. They are more interested in knowing what and whose products you have. And maybe also to what degree they identify individual people by the unique characteristics.

Your phone, for example, would communicate its response to this scan using a unique physical ID (MAC address), and that ID would stay consistent regardless of what wifi network you were on. So you see how that's useful to fucking Palantir or whoever wants it.