Why Captain America was Worthy of Mjolnir?

One interesting fan theory suggests that Captain America's newfound ability to wield Mjolnir in Endgame is not merely about worthiness but has a more complex twist. In "Avengers: Age of Ultron," Cap nearly lifts Thor's enchanted hammer, hinting at his worthiness. However, during a Scarlet Witch-induced nightmare sequence, it's revealed that Cap's greatest fear is an absence of conflict and war. This fear ties into why he can't fully wield Mjolnir at that time. The enchantment on Mjolnir, which deems someone worthy to lift it, could potentially be triggered by one's willingness for peaceful resolution rather than a thirst for combat, as was Thor's initial struggle.

In "Avengers: Endgame," Cap grapples with unprecedented feelings of loss and defeat after the Snap. Unlike his previous approach of punching his way through problems, exemplified by his intense training sessions in "The Avengers" and combat scenarios in "Captain America: The Winter Soldier," Cap now chooses a different path. He takes on the role of a counselor, helping people cope with their grief and guiding them through the recovery process. Moreover, in a pivotal elevator scene, Cap refrains from using physical force to overcome his adversaries, opting for a non-violent approach that avoids harming anyone. This shift in his mentality is a clear departure from the combat-oriented mindset that he had previously exhibited. While Cap ultimately battles Thanos out of necessity, the key difference lies in his intent; he doesn't seek to "punch his way out of this one," as Black Widow remarked in "Captain America: Civil War." Instead, his primary goal is to bring back the people they've lost, underlining his profound transformation from a warrior to a peacemaker, a change that contributes to his worthiness to wield Mjolnir.