No one is writing off something because it is not understood. But in general, a good peereviewed paper, which was published in a well known paper means it is well studied and was maby already tested a second time by critiques. Since scientific findings can be reproduced.
Where any theory, that has not been peer reviewed, has not the same value for me. So it is less likely to even be studied. At least when it is in a field where my knowledge is small. When it is about electronics of physics I may have some knowledge to be able to say if it is plausible. But if it is in medicin I defnitly just lack knoledge to verify a theory myself without help of professional reviewers.