I am quite surprised that Ian chose 17 at Royal St George’s. It certainly is not an easy green to pitch on to with a long club, but I would rate the approaches to 4 and 15 as much less accepting. The slope at the front of the 4th green is more severe than on 17, and the top level of the green (where the pin always seems to be) is significantly smaller. The penalty for going long (or left) is also probably greater. The approach to the 15th is similarly unforgiving: Anything right will kick off the green, leaving a similar shot to being short of 17. A shot that pitches in the middle of the green is in danger of hitting the tier and going long. Pitch short and you are probably left with a 20+ yd bunker shot. Finally, from the back tees, 4 and 15 are respectively 50 and 60 yards longer than 17, so subject to wind, a player who can think about hitting 15 in two is unlikely to have more than a mid-iron into 17.
Two further holes for the discussion:
2nd at Royal Worlington & Newmarket:
Although a par 3, the shot required on this hole is very similar to some of those discussed above. It plays between 200 and 220 yards, but the green would be an unforgiving target from 100. "Pitching on a policeman’s helmet" (Patric Dickinson) is a fair description. I probably hit the par 5 first in two more often than I hit this green in one.
4th at Royal Worlington & Newmarket
Based on length it is more of a bogey 5 than a true par 5, a good drive often leaving a mid to long iron second shot to the green. The green slopes sharply away from the player however, meaning that it is usually impossible to hold with anything longer than a seven iron (and sometimes a wedge). An upslope short of the green means that it is also very difficult to run the ball on, most shots that pitch short of it staying short. The difficulty of chipping from short of this upslope means that there is a temptation to play to finish over the green in two. This can frequently backfire however as there is a stream (played as out of bounds) about 5-10 yards from the back and right of the green, and even if your ball stays in the rough short of the water, your chip may well be impeded by an overhanging willow tree.