The sentence you quote, including
doesn't do so out of quote ‘hopelessness’ or any abstract conviction
is a quotation p. 696 (paperback edition) of David Foster Wallace's book Infinite Jest, which is a novel.
Whether he ever spoke these words in a preview or presentation of the book, I don't know. DFW is a careful writer and sometime teacher of English grammar and composition classes and I'd be more inclined to try to learn from him than to claim that he or his editors made an error.
On the more general topic of transcripts of spoken words, a search on Google for "transcription services" might provide some insight.
Many proceedings or events are transcribed, from speeches and interviews to court trials. One such service transcribes everything but what it calls "filler words" (uhh and umm); it will do filler words as well if the client requests.
Presumably there are situations (e.g., police interviews, grand jury proceedings) where "filler words" may convey hesitation or uncertainty and should therefore be part of the record. In any case the overall objective is to provide in the transcript what the listeners heard.
Some transcription services are qualified (or have qualified staff) for transcribing conversations or dictation that includes confidential matters relating to health.
Some transcriptions (e.g., oral history interviews) are edited and checked for accuracy by both the interviewers and the interviewees; mistaken statements may be changed or footnoted. Statements that aren't properly punctuated and thus will mislead readers are corrected. It all depends on the purpose the transcribed record will serve and how much time and effort (and money) it's worthwhile putting into it. Often the original audio as well as the transcript is availble; sometimes the audio is not.