So many actors, including leads, have been missing performances of “West Side Story” on Broadway “that last week Arthur Laurents, who wrote the show and directed this revival, read his cast the riot act. His tone, I’m told, was chilling. The 91-year-old told them that professionals don’t miss performances, and that they’d better get their acts together or find another line of work. … Producers say actors today, especially kids in their 20s, think nothing of calling in sick.”