Australia was number 10th in the point table at some point and from there, they won the World Cup. Did you know the fact is that Pat Cummins is the first Australian captain to win the World Cup as a bowler? They have played eight World Cup finals and they have won six of them which is incredible. The day was not for India. They have played better cricket in this tournament but the final result is unfortunate. Team India had a similar situation against Australia in the group-stage match. But they managed it well and won the match from there.
After 65 years Aussies have named a fast bowler a captain i.e. Pat Cummins. Ray Lindwall was the previous fast bowler who captained Australia in one test match in 1956. But I think Australia as a unit is so strong that it doesn't matter who is there captain. Since 1999 Aussies are dominating cricket in all formats, there domestic setup is so mature that there are always players available to replace the specialists one upon there retirement.