Some coaches may feel differently, but I know my son (when he catches) and other catchers in his program are expected to back all throws from the infield.
I've never really questioned it. It may be seen as overkill by some, but I guess the flip side is that you never know where the ball is going to ricochet if it ends up in the dirt. Also it's probably a better habit to have the catcher moving on all ground balls, rather than trying to calculate the angle and whether or not he should go.
It may also be dependent on how your field is set up. Closed dugout, positioning of dugout openings, amount of foul territory, etc. are also considerations.