>>102863919Because it's what was needed for his character to progress and grow. Ford needed to learn humility, that he wasn't the be all end all for the survival of humanity, and that he didn't always have all the answers.
>Trust No OneFord's fatal flaw was pride, from his initial trusting of Bill, to his broken relationship with his brother, to his insistence of treating Bill as the Moby Dick to his captain Ahab and trying to take him by himself rather than getting a greater force behind him. He wanted to do everything alone, keep everything a secret because he was convinced that everyone around him (except Dipper later whom he mistakenly saw as a miniature version of himself) was either useless or holding him back.
In the end, however, it ended up being the exact opposite. In the end, it was everyone else contributed majorly to Bill's defeat, someone whom Ford saw as his greatest and most personal enemy, while he himself was completely ineffective. To add salt to the wound, the person he had disregarded the most ended up being the person who was primarily responsible for Bill's defeat. The high point of Ford's development as a character comes in the third journal where he makes the very humble statement that he's proud to be the brother of a hero.