That isn't astonishing at all really. The vast majority of the time, any decent batsman is going to get their side over the line or get out trying. When you take a not out as a given, the win percentage isn't much of a measure of how often they won the match because you aren't counting the vast majority of fails (i.e. when they get out).
For example the win percentage for India when Rohit Sharma is not out in a chase is 100%.
Ain't nothing in the woodshed, except maybe some wood