For a show so consumed with the idea that boredom is dangerous, “Losing Alice” certainly does take its time. Director and writer Sigal Avin so belabors the point that an idle mind can stray into self-destruction that “Losing Alice” paradoxically has the same effect on its viewers. Many times during the eight episodes of “Losing Alice,” as the series recalls other, more visceral and engaging art-imitating-life works like “Black Swan,” “Nocturnal Animals,” and “Mulholland Drive,” you might wonder what “Losing Alice” is saying about the shackles of marriage, the expectation of professional success, and the fear of aging and irrelevance that is particularly unique to these characters or these situations. Unfortunately, the answer isn’t much.