Another way to read this article would be as follows: There has to be something big out there ready for us to build. Now consider (just consider) that one does not necessarily need a "plan" or a "theory" to build things, one should definitely do so, preferably something (seemingly) useless.
But building something big? Without a plan or theory, it's hard to justify the time and cost of doing that.
(Kind of reminds me of the film Contact: the engineers just kind of built a machine from the plans that the aliens sent, without seeming to do any research at all into what the purpose or theory of operation of it was. My reaction to that was complete incredulity.)