That's only if it's considered in the context that it is currently being done. You could book a ballroom at one of Trump's hotels, host 100 / 200 people in the audience and send a stream or video of it over to OAN, NewsMax TV, whoever; who then would broadcast it to their viewers.
The technology exists today that ensures the quality of service as well as the efficiency. What it doesn't do is provide as much leverage of the networks over the parties, not to mention union scales for all the setup and tear down of the stage and network broadcast equipment from the host venue.
All true. It can be done. I wonder if they will pursue something like that.