Is ceteris paribus realistic?

Is it realistic to assume that all other factors remain constant, or "ceteris paribus," in the complex and ever-changing world of economics and finance? This concept, often used in economic models and theories, suggests that we can isolate a single variable and study its effects without considering the influence of other variables. However, in the real world, multiple factors are constantly interacting and influencing each other. Can we truly assume that one variable can be studied in isolation, or is the ceteris paribus assumption a necessary simplification that helps us understand complex economic phenomena?