The NFL has always had a very weird relationship with gambling. For ages they wouldn’t even acknowledge that Vegas existed, Vegas couldn’t put its tourist ads during NFL games, and NBC couldn’t even advertise their show Vegas. Meanwhile one of the first things discussed on the NFL network after the conference round is done is the Vegas Line. Heck used to be each of the pre-game shows talked about the Vegas Line every week. So actually this move to Vegas makes the situation less weird, at least they now admit the city exists.
The weirdest thing in the history of sports television is that Jimmy the Greek was on tv every week for years as a “football” expert. He was not allowed to acknowledge lines.
Hence, he said things like, “I like the Vikings BIG this week, Brent....”