> Perhaps the greatest barrier to using it is akin to envy. We see others who apparently do this without written materials, in their head. I think we see this as evidence of intellectual superiority and harbor the doubt that using an aid like a journal means we are somehow lacking in skill or ability.

To add to your "this is wrong": These others may have themselves solved the problems we are now trying to solve, likely even using a journal. They no longer need a journal since they know how to navigate it, and it appears as superior to us.