Ponting played 10 World Cup knockout matches in his career. Everyone knows what he did in 2003 final, but let’s analyze his performance in the other knockout matches.
1996 QF: 31 runs, Australia won
1996 SF: 15 ball duck, Australia won
1996 Final: 45 runs, Sri Lanka won
1999 SF: 37 runs, Australia won
1999 Final: 24 runs, Australia won
2003 SF: 2 runs, Australia won
2007 SF: 22 runs, Australia won
2007 Final: 37 runs, Australia won
2011 QF: 104 runs, Australia lost
Ponting averaged 21.5 in the 6 World Cup quarterfinals & semifinals that Australia won
If Ponting played for a lesser team, he might never have had the opportunity to play the 2003 final after he scored 2 (8) in the semifinal against Sri Lanka.
When your team is so strong that they can carry you over the line in World Cup knockouts on 6 occasions where you flop big time, you are bound to produce 1-2 great knocks at some point.
This is why this trophy count argument is absolute nonsense. Ponting & Gilchrist choked numerous times in World Cups but it was Warne & McGrath that bailed them out time & time again & gave them the opportunity to make amends.
When your team enables you to play a dozen World Cup knockout matches you will inevitably perform in 1-2 matches.