I'm generally with you in terms of think—then—write, and wondering how people can write/type rapidly then endlessly edit. But I do have some modes where it works to write out incomplete thoughts, getting them out of my head, and then edit them into something workable.
Perhaps some people just really need to take that to extremes, getting out of their head all their fragmentary or preliminary thoughts, and filtering and working them down on paper or the screen?
It generally seems (to me) that a good-heavy amount of thinking first works best and/or is most productive, but overall, we all have different brains, training, and experiences, so I'd go with: "whatever works for you" (but try multiple methods).
Perhaps some people just really need to take that to extremes, getting out of their head all their fragmentary or preliminary thoughts, and filtering and working them down on paper or the screen?
It generally seems (to me) that a good-heavy amount of thinking first works best and/or is most productive, but overall, we all have different brains, training, and experiences, so I'd go with: "whatever works for you" (but try multiple methods).