Former President Donald Trump’s New York criminal trial has featured gripping, and at times steamy, testimony from a former tabloid publisher on the secrets of his business, a porn star on her alleged tryst with Mr. Trump, and a former Trump lawyer on how his boss allegedly paid to silence the porn star. For the media outlets reporting on every twist and turn, the month-long event has provided a steady stream of content for readers and viewers – despite the fact that, at heart, the case is...