Just because DirecTV does not have every sports channel does not prevent them from still being the leader in sports. DirecTV still has more sports than anyone else. Does Dish have the Big Ten Network?
Does anyone other than DirecTV have NFL Sunday Ticket? Are there enough people outside of the local PAC 12 schools areas that care whether the PAC 12 network is on DirecTV? The PAC 12 has been pretty irrelevant in football and basketball for many years. The PAC 12 came up with a model for their network (one national channel and six regional channels) that was designed with cable in mind. That model does not work well for DirecTV. At some point, I expect the PAC 12 national channel and overflow channels for live games will be on DirecTV (and in HD) as soon as the PAC 12 comes to its senses.
The Lakers are relavent in the NBA, but a channel devoted to one team in one sport has little to offer for a national market. Serious basketball fans will have NBA League Pass, and the others outside of LA will not care that they are missing Lakers home games. That said, let's wait until the NBA season starts to see whether it will be on DirecTV. I expect it will be on DirecTV, too, but it might not be until the All-Star break.
Not much of a sports fan, huh? There's a team in Eugene, OR and another LUCKy team on the Bay in NoCal that like to think they've been pretty relevant the last few years.