It comes down to the crew you are working with at the end of the day and how much of a priority and importance they regard sound to be. I've worked with productions that gave me full power to call “Cut!” and re-take whenever I deemed the sound unusable. I have also come across productions with little to no regard for live sound whatsoever, often obsessed with only what the camera sees and are the principle offenders of the dreaded “We'll fix it in post!” speech."