Twenty years ago, Chevron went on a female diversity kick and identified talented early career employees to move through the ranks quickly to management. They were given lots of short-term assignments where they never really developed their competencies fully or were held accountable for their decisions before being promoted to their next "position of increasing responsibility". Double promotions were not uncommon.
If you look at the examples sighted by the OP, they all eventually got to a position where they were expected to deliver results. When the feed-back on their performance was negative, they walked.
The same situation plays out with both genders identified early as "Future Leaders" and "ePots". They are whisked through the system without gaining the skills needed for the responsibilities they are given. Once anointed, they cannot be removed.
The focus on perceived potential versus actual performance could doom Chevron.