If this is something that has happened in the middle of a major town, you may have a point. However, it was placed in an extremely remote part of the Utah desert, only easily accessible by helicopter, put together not by one man but likely by a team. Not only that, it has been there undiscovered for over four years and no-one knows who put it there or why. It is a highly unusual event. Your reason for its existence, ostensibly, for attention-seeking, is merely an assumption and based on nothing whatsoever other than personal opinion.
Bear in mind the clear, obvious links to
2001: A Space Odyssey, which is considered by many to be
the finest film of all time, and it's clear to see why there is a cultural link to extraterrestrials which would interest and intrigue many people the world over.