Shouldn't need to install a program to add functionality that should've been included in the OS from the start.
They can't think to include everything in every program they build, nor can they afford to. For all you know, there could be a very legitimate reason why Windows excluded such things.
Just because you or I think it was logical and should not have been left out, does not make it a reason that "it should have been there from the start". That's akin to saying the OS developers should have better than 20/20 vision of what users will want and need.