It all depends on whether the paper fits the journal. Minor journals serve a useful service as a repository for minor results. And minor results are still worth publishing because they might provide a detail or technique later needed for a major result. The thing to be wary of is when you see a stunning result that should really be in _Nature_ or _Science_ in some minor journal. Why isn't it? Was it submitted there first and rejected? It would be nice if the history of a manuscript (and its peer review) stayed with a manuscript so you could see if the authors really corrected problems brought up by peer review or were just spamming journals with a flawed manuscript until they found one that published it.

There is no reasoning. I gave you a statement of fact:

I have personally seen highly talented and successful researchers use the heuristic of journal quality when looking at the state of their field. These people are highly competent by any standard. If you want to play word games with negation you could say they are not not very competent.