He's always looking for a shot, because he's confident in his shooting ability. He can be too selfish at times, but he's in that team to score the goals and that's what he's doing.
C. Ronaldo is/was quite often also accused of this. Pretty decent goalscorer as well, that bloke.
In the end, if you have the ability to put the ball in the net, why not do it? Spurs' coaching staff are obviously encouraging their players to take a shot whenever possible. They do an excellent job of getting on the end of scraps in the box.
