I stand by my interpretation that Braska goes on the pilgrimage because he’s suicidal. Nobody makes reference to this ten years later, but why would they? Everything everyone (except Auron) knows about Braska’s motivations comes from two sources: Yevon’s official narrative, and Yuna’s memories of her father. Given the nature of Yevonite society I don’t think it’s a huge leap to suggest they would be highly offended by the mere notion of depression and suicide and would want to sweep that under the carpet as soon as possible. As for the other, Braska surely wouldn’t have been telling his seven-year-old daughter about how much he wanted to die. Not to say there’s no truth in “my father wanted to make Spira’s sorrow go away”; I’m sure that’s a valid reason for his pilgrimage as well. I just think going through with it allowed him to achieve that while also fulfilling the personal goal of putting an end to his own existence. He’d been disgraced and rejected by his people for the sake of his marriage, and now even his wife was gone, and … he was a very lonely and miserable person, who decided that becoming a summoner would be the most profitable way of ending his life.