So Apple is suing everyone because they want their competition to differentiate, innovate, and, in general, become better?
No, Apple is suing them, with or without merit, in order to make it harder for competition to compete with them, to make their lives harder, and to ensure own leadership position as long as possible.
In addition, it's not fair to call someone copycat just because it has square screen on square phone. What they had to do, to put round screen on triangular device?