to choose one game to attend, they don't have to hassle with driving into the City, finding someplace to park on the street (and hope their car doesn't get jacked before they get back to it), and then watching the game in a tiny gym, if their one game is Santa Clara.
It was cool to go to USF for the game once, but I wouldn't go to the trouble again if I lived out that way. I'd go to the Santa Clara game, and maybe drive up to the St. Mary's game if it was a Saturday and not Thursday at 9pm local time.