The reader writer relationship is all about trust. When you pick up a book you trust the author is going to tell you a good story, one you'll enjoy (though definitions of 'enjoy' may change). The reader has to trust the writer enough to spend time and money on that book. But the writer has to trust the reader too.
The writer has to trust the reader to understand what's going on and not over explain. They also have to trust that the reader is intelligent enough to notice when they didn't figure out all of the plot and tried to skip over glaring holes.
I can forgive plot holes and bad writing before I can forgive an author who saw the problem, and tried to fix it with a few sentences of an incomplete description. Knowing the author was aware of the problem but didn't care enough about the reader to fix it can destroy the trust between a reader and a writer.