In Linux you have to know the name of your distro, the version, perhaps what package manager you have, you have to decide whether to install through the package manager, or download the deb, rpm or tarball...
Maybe a few things are self-explanatory but you do have a choice.
Windows users, or users coming from windows don't have a clue. They have a computer and want to install certain software. Just like I do that on my iPhone. I click the icon of an app I want to install, magic things happen and a few minutes later I have that app. Do you think I would know or care which version OS I have. What is an OS anyway?