Disagree. He throws downfield when asked to. And the last two weeks (and 4th Q of Denver) was very successful in doing so.
Smith also has a higher Yards per attempt than:
Aaron Rodgers
Derek Carr
Cam Newton
Eli Manning
Carson Palmer
Joe Flacco
But it's always convenient to buy into the common narrative. When he is your team's QB (as a fan), you become grateful that you have him. Frankly I wish Reid would turn him loose more. He has weapons to work with up and down the field.
Alex Smith is a damn good quarterback.