Why do you care? Isn't it better to just focus on perfecting your art, or your code, and not waste time trying to prevent people copying it in some way. People

Why do you care? Isn't it better to just focus on perfecting your art, or your code, and not waste time trying to prevent people copying it in some way. People are going to copy anyway, everything is a copy of something. But if you create your own style so perfected that it cannot be copied without tremendous amount of time, you are already ahead of everybody else in your skill. Also, more time to develop your skill than to waste time on trying to prevent somebody else doing the same thing.