Once we are in a group that regularly reinforces exploratory thought, the routine becomes reflexive, running on its own. Exploratory thought becomes … - Annie Duke

A higher chance of failing is more tolerated on paths that don't rock the boat. After all, what's the go-to defense in a postmortem after we make a decision that doesn't work out? "I followed procedure," or "I stuck with the status quo," or "I made the consensus choice."

At the moment that quitting becomes the objectively best choice, in practice things generally won't look particularly grim, even though the present does contain clues that can help you figure out how the future might unfold. The problem is, perhaps because of our aversion to quitting, we tend to rationalize away the clues contained in the present that would allow us to see how bad things really are.

In large part, we are what we do, and our identity is closely connected with whatever we're focused on, including our careers, relationships, projects, and hobbies. When we quit any of those things, we have to deal with the prospect of quitting part of our identity. And that is painful.