It is not lost on me that most of my posts at this blog are on topics that have historically been the province of religion and metaphysics: the fundamental nature of reality, and the origins of humanity.
Neither field, of course, has any great practical application. We are reaching the point where any unsolved problems in physics are unlikely to have engineering applications. And, the prehistoric ancestral roots of humanity aren't necessarily helpful and indeed have the potential to be counterproductive in dealing with the present affairs of humanity. These fields are science for the sake of science. One can imagine spin-off benefits arising from these studies, but they aren't terribly utilitarian pursuits.
Do I blog to satisfy some unmet psychological need that arises because I am not religious, and in particular, do not subscribe to theological doctrine regarding metaphysics and human origins? Perhaps. But, part of the point is that these are grand problems that address ultimate and eternal questions. They are difficult and complex, but most of the "forest level" data needed to think seriously about them are widely accessible to members of the educated lay public like myself, via the Internet, for free or something close to free.