Ok all I want is hide the article title, no big deal, right?
So here is what I have:

H
Why is it like this? So you can have the flexibility to change your display but also the simplicity to set your most commonly used settings in global configuration.
Global configuration sets the default display. You should set your globals to the most common settings that you will use in your site. Then you should only use individual article or menu settings when you want to override those settings. Really, most people never need to override becasue they want to have a consistent look and feel.
However, if you do want to have a mixture of settings the next step is to change individual items. For example on a given article you may have a date show even though by default you never show a date.
Still, what if sometimes you want to show the author but sometimes you don't? Do you have to copy the article completely to set new params? No, that would be ridiculous and a pain to maintain. In that case you create a menu item linking to that article. The menu link options can be used to override the options from the specific article. Again, you should really only be using this in special cases since you have already thoughtfully set your global and item level settings.
So the cascade is menu overrides item overrides global.
Joomla also gives you a lot of other options for this kind of thing such as you can even put an alternate layout. It could be (and is) a criticism that joomla goes too far in letting you customize everything so much and it creates an overwhelming UI, but on the other hand if you are used to it, it is very powerful.