That's all it takes for some people, Isaac, *when you have the requirements* already set up. In your case, you already had Java installed and working fine. You also have manually downloaded the .jar., placed it in desktop (equivalent to creating a launcher). Your desktop also had a convenient .jar->java file open association, and the default parameters worked fine. Now add a nice icon and that's what most basic install scripts will do.
It worked for you, it works for some, perhaps even for most, but not for everyone. Some require a few tweaks and workarounds. And that's what some install scripts try to do. Some also add nice features like mod management.
Bookmarks