bad shooters shooting

Here is something I do not understand. Central Arkansas' Chris Poellnitz has the second-most 3-point attempts on the team, and since he missed four games has the most attempts/game. Yet he is shooting only 20% from the arc. Why does the coach allow him to blast away. Granted UCA does not have many outside threats, but surely they can find someone who can shoot better than 20%! I never have understood why coaches allow players who cannot shoot to take so many shots.