As you learn, you make mistakes. It’s going to happen. That’s why you have to learn. You practice and practice and eventually, you make fewer mistakes. Finally, you reach that stage where mistakes are rare.
So as a photographer, you have to ensure your shutter speed is appropriate for the situation you’re photographing. Every moving subject can be captured mid-action by an appropriate shutter speed. Any speed that isn’t man-enough for the job, one that is too slow… and there will be motion blur.