Is it a very interesting and imaginative subject for cats to protect their owners when they see ghosts. However, this issue touches on some supernatural and mysterious themes that lack scientific evidence to support them. Therefore, I cannot give a definitive answer.
First of all, we need to be clear that cats are animals and their actions and reactions are driven by their instincts and experiences, not by supernatural forces. Seeing ghosts in cats does not cause them to become particularly brave or intelligent, and it is unlikely that they will protect their owners because of this.
However, in many cultures and folklore, cats are seen as animals with mystical and supernatural powers. These legends often involve cats being able to perceive things that humans can't, or being able to foresee bad omens. While these legends have certain symbolic and belief values, they lack the support of scientific evidence.
Therefore, if we look at the problem from a realistic and scientific point of view, then the fact that cats see ghosts does not directly cause them to protect their owners. However, if the owner encounters a dangerous or fearful situation, the cat may protect the owner through its instinctive reactions, such as launching an attack or barking loudly.
Overall, whether cats see ghosts and protect their owners is an interesting and imaginative subject, but it lacks scientific evidence to support it. We should look at animal behavior and reactions on the basis of reality and science, rather than relying too heavily on cultural and legendary interpretations.