True, and I suppose that's a certain filter of its own. I suppose the main thing that makes me roll my eyes is that having done SETI by half measures for a handful of decades, the article is asking if it's time to assume that the rather presumptuous (though not absurd) zoo hypothesis is "the answer".
This all is what it is. The results so far imply virtually nothing about anything, except I suppose that there is not a very close civilization intentionally listening for our types of signals and eager to communicate back.
sonori