Board Thread:General Discussion/@comment-35233810-20180418165518/@comment-5398287-20180419161451

Indeed. Also, I feel like people overlook the fact that Ichigo's never expressed a desire to join the Gotei 13 in any formal capacity, only just barely fulfilled his duties as a Substitute Shinigami, and has always been about protecting his friends - many of which reside in the Human World. If he became a captain, he'd have much less opportunity to see them, let alone help them out.