Exactly.
The only player I have ever seen who somehow managed to excel in key situations was Pat Tabler, who, for reasons no one could ever explain, went from being an average hitter to being am elite hitter when the were bases loaded. He was so good in that one specific situation that he was occasionally brought in to pinch hit for heart of the order hitters if it was important enough..
But beyond that one freak situational skill, Tabler was nothing special. ..