I think some people need to verbalise their thoughts, maybe to reiterate, like hearing them makes it more real or valid. I'm not sure.
The brain is a powerful tool and can bring great awareness, or take it away, and everything in between. I guess we all need to determine how best to use it to achieve the outcomes we prefer.
You are really right, when we hear ourselves it makes our imaginations more concrete and our confidence are built stronger, thank you for this topic.