The cancellation of "One Day at a Time" hurts in a way the diversity numbers can't fully convey. In Netflix's Cuban-American family sitcom, "One Day at a Time," Rita Moreno's punchy one-liners are a complete delight. Justina Machado, who stars as single mom Penelope Alvarez, triggers a sobfest every time she delivers an utterly vulnerable monologue. The series tackles issues from homophobia to colorism with sensitivity and insight, and offers Latinos -- members of a woefully underserved demographic -- the chance to see ourselves, warts and all, while still reliably delivering laughs and earning rave reviews. Aside from being a...