Yeah, I've seen guys try those movie kicks irl street fights. Sooo not effective.
In a rl fight, you have to keep your defenses close to your body, and your feet planted firmly on the ground 90% of the time.
Balance is crucial. Get knocked off your center and you land on your ass (or worse, your face.)
Kicks should not be designed to land higher than your opponent's waist.
Knees are a much more effective target.