I recently read a blog post discussing the merits of using Dreamweaver for development. Points of view ranged from code purists denouncing Dreamweaver for producing bloated code and a lack of real coding knowledge to Dreamweaver loyalists defending the HTML editor. I see both points of view, and here are my two cents.
On the code purist side, if you have never coded from scratch and you solely work in design view, then yes you should probably consider hand coding because your code is probably sloppy and you don't really understand what is actually going on behind the scenes.
To the loyalists, I love Dreamweaver. I first learned to code HTML and CSS on Notepad (Yes, Notepad, not Notepadd++, Notepad). Once I found Dreamweaver, I fell in love. Keyboard short cuts for creating HTML, built-in FTP support, code hints, custom code formatting, automatic tag closing, code coloring, split code- and design- views and the list goes on and on.
And as a web developer I have tried and used many different editors: Nvu, Komodo Edit, Notepadd++, Eclipse, TextWrangler; but I always come back and mainly use Dreamweaver in my own personal day-to-day work.
In conclusion, use whatever works for you. I'm sure many supervisors could care less how you coded something as long as it works and the code is readable and manageable. If you freelance, coding fast is important to you and your clients. If you have a tool that makes you faster, I recommend using it. Your clients will appreciate it and it will make you look like a coding champ.