Color correction is essential. I was shooting an audition video of my buddy and actor Joe Halsey (josephhalsey.com) while we were shooting audition videos next to a giant glass door. In between takes I snapped this picture. After the moment passed I look and the color was so off. But loved the light and emotion. So have the tools and skill set to be able to salvage a photograph and turn it into something great is essential. Especially if you're working for a client and make a mistake. Having the skills to replace specific colors and changing colors completely is an industry standard.