Well that's true, but the point is that the light from the inside ends up nearly sucking all of the light from the outside of the stadium that it becomes not as easy to see stuff that you normally would if none of the lights were on. This includes stars, the dark blue/purple sky (depending on cloud cover), and yes, even far away objects.
Consider this wonky night transition that I will show you of PNC Park. Maybe this is around the start of a game (beautiful look by the way):
Then maybe you'll get the third inning right here:
But then once you hit the 5th inning and on, all of the sudden you get that "pitch black" look and the ambient light kicks in. While you can still see the buildings, it's not quite as clear anymore:
Now remember, this has more to do with the fact that you are inside the lit up stadium and less to do with because it's just night time. Look at any other night time downtown Pittsburgh shot without lights in your face:
But that's neither here nor there, they capture the ambient light thing rather well already, before they had wonky transition issues though (going to a strange grayish sky then suddenly shooting to black). It looks like they might be going a different route this year though, and if that's true that means they are currently batting 1.000 with
every improvement that I might have brought up. These guys are on fire! There's a reason to nitpick you know.