I think it's fair to ask of any new program why to use it rather than an existing option. And there can be lots of reasons - more active development, new features, less buggy, smaller program (uses less disk/memory, easier to be less buggy), easier to install, easier to use, whatever. And the author of a program doesn't necessarily need to have an answer, especially not early on; programming is sometimes its own reward, and sometimes advantages only become obvious later. But as a user, yeah it's useful to know what advantage this thing has over all the other things that do the ~same stuff.