Because there are legitimate reasons why Facebook might need access to your network for streaming videos to a TV or similar uses cases.
Apple doesn't know what every app does, they basically know what frameworks/syscalls get made. You can wrap entitlements around those things without explicitly knowing exactly what an application is actually up to.
Apple doesn't know what every app does, they basically know what frameworks/syscalls get made. You can wrap entitlements around those things without explicitly knowing exactly what an application is actually up to.