I suspect talking out loud could have even greater benefits for people with little or no internal monologue [1]. Would be curious to hear if anyone has first-hand experience.
[1]: https://en.wikipedia.org/wiki/Internal_monologue#Absence_of_...
[1]: https://en.wikipedia.org/wiki/Internal_monologue#Absence_of_...
For me, "thinking" is more like submitting a request to the subconscious and waiting for a response. Not much happens in the brain's "foreground"--or at least it feels that way.