To quote the article:
> But even putting aside the fact that claiming someone else's writing as one's own is wrong, the value in survey papers is in how they re-frame the field. A survey paper that just copies directly from the prior paper hasn't contributed anything new to the field that couldn't be obtained from a list of references.
Good survey papers can be important contributions in their own right (e.g. [1]). A good survey should contextualize works within a subject area with respect to each other and identify high level trends/ideas in that subject. These connections are not only useful for learning a topic, but also for positioning novel work or identifying under-researched areas to focus on.
If the authors felt that one of the papers they plagiarized concisely expressed what they wanted to say, they could simply quote and cite that work. Otherwise, it could be construed that the authors are claiming to be the ones drawing the conclusions they wrote. Moreover, from the article, the survey in question seems to be pretty egregiously plagiarizing, which deserves to be called out/shamed.
[1] https://arxiv.org/abs/2111.11426