It's not skepticism, it's rejectionism. Skepticism would have been to look up the paper and then argue that it's deficient in some manner - sample size too small, errors in the methodology, whatever it may be. I'm well aware that many, many published studies are scientifically deficient or overstated in some way, and have no problem with such deficiencies being pointed out.

Asking 'did the researchers consider X' without bothering to even look at the paper is just posturing. It's on the same level as saying 'this looks shopped - I can tell by some of the pixels and from having seen quite a few shop jobs in my time.' It may be an attempt to signal hard-headedness and intellectual rigor, but absent any specific target for the criticism, it's worthless.