Sure, Bent is probably the better at ensuring the ball goes into the net but he's hopeless without a support structure around him. Holt is happy to drop back into the midfield and hassle players there, contest for balls and win challenges. He is also able to make decent wide runs and get balls into the box for other players. The trouble with so many of our superstar strikers is that they just hang around the top end of the field relying on the the midfield to create the chances.
Plus, I can't see Holt throwing himself on the floor if a player coughs near him.
Also, what's wrong with Crouch? I trust he's just being kept out of this game to allow younger players a chance? His selection for the Euros is a sure thing surely?