Incorrect. The NFL allows the local market fan to watch every single one of their local team's games unless it is not a sell-out. In that instance, nobody gets to watch it. In those markets, the NFL even puts the game on a broadcast channel, except for the Monday night game.
So, it isn't anything close to the Comcast/Portland situation. I keep seeing people post this, and it's an invalid comparison.
I'd equate the DirectTV Sunday Ticket situation more closely to a Blazer fan in another market who wants to watch their games. Of course, they can always get League Pass to do so, just as me, a Raider fan, can get the Sunday Ticket to watch every Raider game (which is becoming harder to sit through each week). If the idea is to watch your local NFL team, then the Sunday ticket does not prohibit you from doing so.