No, it's not about that, and shame on you for thinking so.
It's the plain fact that if this were a problem on Windows or linux, a free script would be available, but because it's Apple, it's a paid plugin or add-on, as it is with everything you need to customise an apple device.
It's a matter of developer culture, where you develop things for a fun, and to solve a problem. Not to make a quick buck.
