So, there was obviously the cynical reason of more ratings and stuff, but I also wonder if a lot of these networks were also explicitly waiting for Trump to go golfing to announce the results, because they knew in that case he would not be set up to have a big conferences directly after to question the results. We all know that he will eventually, but the narrative and reality of Biden winning is going to set in the air for most of the weekend before he does, making the inevitable questioning of the results have less time to fester.
Maybe thinking too much into it, but it doesn't feel like a coincidence that this happened just an hour or so after it was announced he was heading to the golf course for the day.