This behavior is not unique to S&T and is product of how individuals succeed and advance within PepsiCo. Athena is merely operating with "The Real PepsiCo Way" - the one they don't tell you about when you are hired and one that is only learned through acculturation.
The organization as a whole is one where "high potential" individuals are encouraged and expected to move about the organization every two to three years (Remember the 2022 random shuffling of Mike Del Pozzo, Rachel Ferdinando, Brett O’Brien, and Cara Keating to business units outside of their previous roles). This ethos permeates all the way down throughout the organization, and individuals who are not moving within the company are generally forced out of the company via layoffs or decide to leave on their own. As a result, from middle management up there is very little depth of expertise as people are not in role long enough to develop a long term track record of success within their respective business unit or functional area. As a result, we are constantly in a state of recreating the wheel every three to five years.
Combined with the fact that PepsiCo tends to attract "Type-A" personality (read: sociopathic) individuals, who view their peers as mere chess pieces to be used to advance their own career, this creates a perfect storm manufacturing the toxic culture that we all rail against on this site. As a result, individuals tend to advance within the organization without any accomplishments and candidly, don't know how to do basic project and people management tasks.
In the end, the likely scenario for S&T (as has been the case with individuals associated with projects like PGT or any other "transformation" initiative) is that Athena will ultimately be promoted out of this role and will have declared an early victory, saying something along the lines of, "The next bag holder is set up for success with whatever foundation was established by me and my team. Best of luck." There will be no long term accountability; and associates will ultimately forget that she was even involved with this initiative - ironically, as they too will have moved about the organization to advance their careers, leaving the next generation to deal with the mess.
Its a corporate game of musical chairs - don't be the last one left holding the bag when everyone else bails.