These works allow some self-congratulation, both for the play’s hammering on of a hard nut, and for your ticket purchase and bearing witness to an important work, but there’s so much showmanship involved that it dilutes the effect. The handsome British issue drama doesn’t trust you to be interested in a subject on its own terms, so like a good governess, it’ll provide more and more sugar to make the medicine go down. At a certain point, there’s so much sucrose in the recipe, you wonder if the health benefits are gone.