It is the 20th century new critics who championed that the process that lead to writing was less important than its result: the published literary work. New critics espoused the Romantic fantasy of spontaneous creation and genius (read: if genius comes spontaneously, then there is no use for process).
This principle also implies that a published literary work is self-containing and complete (i.e., whole and final) and that its interpretation can be found within itself.
Scandura, Jani. “The Matter of Drafts.” Oxford Research Encyclopedia of Literature, edited by Paula Rabinowitz, Oxford University Press, 2020. DOI.org (Crossref), https://doi.org/10.1093/acrefore/9780190201098.013.205