6:30 PM is part of rush hour.
Not only that, but who the hell plans on getting to the game 1 minute before the puck drops?
Game times in Arizona are 7PM, sometimes 7:30.
Westgate, where the rink is, has a ton of great places to hang out at before the game. They also allow tailgating in the lot for certain games if you want. So in order to get there with an hour to spare to get game ready, you have to leave Phoenix or Scottsdale at 4:30-5 and hope no traffic is in the way.
But if you have a job and/or family to take, it makes it impossible to get there with any kind of cushion.
If the rink was in an urban area, like it used to be when they were at America West, there's a much bigger pool of fans that can get there.
But hey Google Maps tells me its close, so the people there just suck.