I think there are tradeoffs though, and this has been a thorn in my side during technical interviews where you are expected to think out loud because:

1. Sometimes you have a vague sense of the shape of the solution, and ime it can be helpful to sit with it for a while before trying to shape it into words.

2. Talking out loud forces structure but it also rate-limits how quickly you can iterate through ideas to find one that plausibly solves the problem at hand