Scarlett Johansson says having her first kid was a "big turning point" in her life. JC Olivera/Variety via Getty Images Scarlett Johansson, 41, says good parenting is about doing your best, not being perfect. She said someone once told her that being successful as a parent "75% of the time" is enough. She also doesn't believe in work-life balance because there's often "a deficit in some area" of her life, she said. Scarlett Johansson, 41, says being a good parent doesn't mean getting everyt...