That is insane and ridiculous, I cannot just download or re install a browser without having to re install the OS or user an external programme to get the application? I thought Apple was supposed to be better/different to M'soft. And please don't use the excuse that it is integral to the OS or some such, that was M'softs defence and it was knocked out of court years ago.
I know it's a rant but Apple seem to be less and less customer focused.
The browser isn't THAT integral to the OS, but the WebKit framework is used for all HTML-displaying in any program that needs them, e.g. Help Viewer. You can delete Safari and still be able to use WebKit in other apps, just not in Safari because you don't have it anymore. Apple doesn't expect anyone to ever delete Safari except for people who know exactly what they're getting themselves into. Those kinds of people are not posting on this forum asking for help because they deleted Safari. Thus, Apple doesn't necessarily include the entire app in any update, just the stuff that was changed.
Besides, if you delete iexplore.exe from C:\Program Files\Internet Explorer you surely don't expect to get it back easily, but at least you can use the HTML rendering engine to view help files.
Now that you mention it, Safari is a bit like IE "back in the day", except for the difference in market share.