In 2014, Saturday Night Live debuted “High School Theater Show,” a sketch that recurred four times until 2016. The sketch usually revolved around a high school theater troupe staging a Black-Box show, the message of which is delivered with such grandiosity through countless inscrutable vagueries that the audience becomes hard-pressed to find the point. When Christopher Boone, the main character of the Tony Award-winning play “The Curious Incident of the Dog in the Night-Time,” keels over in panic as the ensemble breathes in sync with him and shuffles minimalist boxes around the neon-lit stage, one can’t help but wish they were watching “High School Theatre Show” instead. At least that sketch is in on the joke. Instead, this San Francisco Playhouse production settles for a self-serious tone that wars with blunt staging and its cast’s atonal performance styles. One could argue that these immature executions of an often compelling script are innovative representations of what the mind o...