Eh, obviously all else being the same 360 would be better - but it’s a lot easier to make 3D camera rigs and streams that at 180 degrees.
People also probably don’t realize just how much bandwidth this takes. You need enough to stream to both 4K eyes along with enough buffer space wherever the head can turn so that there isn’t a delay when you move your head. A good portion of the world doesn’t have fast enough internet for that.
There's a big difference between just five games and all the games in a season.
I could totally see it moving $3500 headsets if it were actually all games. Also 180° is good enough for a lot of things but for this you'd want 360°.