If your bitch has a high risk of problems during natural whelping, then yes. This would include brachycephalic breeds, individuals who have a history of past whelping problems (or come from a line with a history of problems), or bitches who have very large or very small litters for their size. Otherwise, elective C-section can still be a very safe and reasonable option even for a bitch who otherwise would probably whelp naturally. This is worth further discussion about your individual case and concerns.