Actually self-talk is up for "review" in the culture/media. Kids are being encouraged to use it to scaffold their academic learning.

And, no writer worth a Tony or Oscar would release a script without reading it out loud.

No less an authority than Lawrence Olivier suggested to a writer he was working with that he ACT his drafts "outloud" to improve them.

Lawrence Olivier. 1952. "To digress a little. You know darling boy if you would act some of your roles, which I am sure you could do as well as any of us, you would find out so much that would cause you constructive pondering. ... It could never ever be right or desirable in the theatre that we lose our audience. …
The emotions of the audience last the longest of the contributions they bring to the theatre. Intellect wears out the quickest. After all they have paid their money to enjoy themselves."

Talk on!
Revu2