But in DW you can use libraies or templates, the libraies are like snippets of html so that you can create a nav bar point it to your files and then any other pages you make will just use that same piece of code. Updating it will update all the other pages that use it.
That particular feature of FP is precisely the thing that produces all that code-bloat and unhappy SEOs. It's a neat concept that doesn't work very smoothly in its execution.
Fortunately you can do the same thing in FP without themes with Include Pages, or you could use SSI. I don't have DreamWeaver, so I can't say what it does...
Yes, the idea of having the software auto-generate links on your navigation is nice, but with only a little more work on your side you can do almost the exact same thing, and still have control over the end result.