In Wickman's "Wicked Problems in Technical Communication", the author discusses the importance of students collaborating in order to tackle the "wicked problem" of the Gulf Oil Spill. In that context, the collaboration was helpful because students came from a variety of disciplines. Here, student writers enter a "discourse community" within a single area of study, but the general benefit applies. Although a student might using resources centered on a single topic, they would still come from a variety of viewpoints and research paradigms. For example, one author may have focused on positivist, quantitative research, while another may have focused on anti-positivist, qualitative research, which would produce different results, despite focusing on the same subject.
Wickman, C. (2014). Wicked Problems in Technical Communication. Journal Of Technical Writing & Communication, 44(1), 23-42.