There is a patchwork of law and regulations that all need to be aligned to allow internet streaming of broadcasts. Copyright Office regulations, FCC regulations and the Communications Act. Today they (a) are not all aligned and (b) need interpreting by the courts to see how they apply to the internet.
What we're seeing is that being worked out in court cases, Congress, FCC proceedings and Copyright Office proceedings.
It will get worked out but my opinion is that it will need Congress to intervene eventually.