To be most intuitive to use, computers should converse like a human. Humans have LOTS of options, and everyone understands that. E.g. if I ask a human to make a sandwich, I can specify all the ingredients I want, how and when I want it, and so on.
Far future of course, but that is the most intuitive end goal of computers: you ask them what you want in natural language, they understand and provide it.
For now, because the above does not yet work, please provide options. Fortunately Firefox provides many options for those who need them: about:config. I find it really awesome if you can adjust an application to your needs at such fine grained level.
Adding more in the way you prescribe isn't just adding more, but officially supporting more at the code level and user level.
Depends who you ask. My mate and a few close friends would know to make me a sandwich without bread, but hardly anyone else would get that right.