Maybe I'm trying to read and understand it too quickly, but I don't see anything in the abstract that supports that strong conclusion.
> The results revealed that: (1) learners who received different learning support showed no difference in post-task intrinsic motivation; (2) there were significant differences in the frequency and sequences of the self-regulated learning processes among groups; (3) ChatGPT group outperformed in the essay score improvement but their knowledge gain and transfer were not significantly different. Our research found that in the absence of differences in motivation, learners with different supports still exhibited different self-regulated learning processes, ultimately leading to differentiated performance.
The ChatGPT group performed better on essay scores, they showed no deficit in knowledge gain or transfer, but they showed different self-regulated learning processes (not worse or better, just different?).
If anything, my own conclusion from the abstract would be that ChatGPT is helpful as a learning tool as it helped them improve essay scores without compromising knowledge learning. But again, I only read the abstract, maybe they go into more details in the paper that make the abstract make more sense.