Did I Expect too much?

I purchased a pair of speakers from a US manufacturer who I shall not name.  The speakers are beautiful and the sound exceeds my expectations (after a minor upgrade).  So why would such a reputable company use six dollar binding posts?  It makes no sense.  I replaced them with Cardas binding posts and decent 12 gauge wire between the driver and posts.  My system is valued for clarity and clean highs.  The difference was audible.  I know, snake oil.  But it wasn’t.  I don’t think that spending $15K for speakers is nothing.  So yes, I was disappointed.