"I think the fundamental problem with noisy people is not that they're inconsiderate, but that they don't have any train of thought to interrupt, and they thus don't realize the havoc they're wreaking."

A more polite, and perhaps more accurate rendering would be "Many noisy people work out what they think by saying it." To some of them the introvert who much prefers to think matters out before speaking may seem as thoughtless as they do to the introvert.