There is no centralized location for starships to be built, as it is all compartmentalized and divided within world-wide and global company frameworking.
A lot of people scoff at it as evidence because they can google search various images, and they just can't put the pieces together. Some people will not EVER be able to put the pieces together, not even if they are told the truth. How can the truth even BE told?
There is a generation of "the Lost people" in the world, in societies, in world societies ... whole smatterings of ignorant masses. They live in some weird reality that is based on fear and disempowerment and university educations where they are taught in schools (like schools of fish) to direct their minds to close their third Eye. Experience also (experiments) upon application of the knowledge one learns also takes time.
I kinda thought they'd be able to understand these things but, these things are hard, and require lots and lots of years to really comprehend, and many, many books read and youtube videos watched, to learn to see through the illusion.
The Truth is yet unfolding, strangely enough. We can all watch as the pieces of the whole big picture fill themselves in. Well, not all of us can see it. But there are those who can. Can you? That's what matters. You have to decide ... well at this point it's safe to say you can "choose" rather, of a wide variation of experiences of reality. Actually, a choice isn't really what creates oneself to be there; only a Decision as an Act of Will can accomplish that -- navigating through parallel possible realities to the one you want based on the ones you can vibrate within, in resonance. And if you don't know what that means, and some of you don't, then I won't get my feelings hurt.