SAM's "quest" is about finding meaning in the life planned for her. She is an undifferentiated, immature person, like most teenagers, who not only has no purpose to her life, she suffers under the weight of the expectations society places on her. She found someone who found himself in difficult crossroads as well, albeit on a far grander scale.
She found a role model.
She struggles with the complexities of Sisko's life: don't we, the fans, always celebrate how complex, how complete Sisko is?
The fact that SAM is young and inexperienced and Sisko was mature and heroic is not really relevant to how role models shape people's lives. How many young kids learned about perseverance and humility from Lou Gehrig, but never played professional baseball? SAM learned that she could not reduce Benjamin Sisko to a few facts. He was burdened with the expectations placed on him by Starfleet, Bajor, and the Prophets, all of which worked against his personal happiness. Yet that happiness was real, and that private life was the strength of that allowed him to be a hero, to play the part others wanted him to play.
These ideas were rife in DS9: The Homecoming, The Siege, The Collaborator, Defiant, Destiny, Way of the Warrior, Accession, Rapture, For the Uniform, Blaze of Glory, Sacrifice of Angels, Tears of the Prophets, Shadows and Symbols, Once more Unto the Breach and the final ten.
Yes, we will quibble about the details of "Series Acclimation Mil," but this episode got right a lot of things about how Deep Space Nine told stories.