I DON'T KNOW!
I freewrite. Then I go back and quickly proofread just for typos. I finally actually read it and I am almost always as surprised as you are when I finish reading. I touch it up after that without changing content at all, because if I start to tinker with it there is no "skillfull crafting" going on, they always get worse, muddied, contrived. So as much as possible I try to publish them exactly as they came out. Then I get to learn something.
I once interviewed a nanny with speech like that. For some reason (all my closest friends were shrinks in those days, no kidding 100%) I knew it was caused by psychotropic medications, and did not consider her. I saw that woman as I wrote this. Otherwise, all pur imagination. Well, except for the useless husband.
RE: The Interview, a freewrite