You've got some pretty misguided views when it comes to coding. Not that it's wrong, but there's a lot more to the whole web developer thing than just programs, especially if you want to make it in the industry.
Learning how to hand code HTML and CSS is a requirement. Period, end of story. I personally don't know this from experience (as I learned from the ground up), but learning how to design from a program like Dreamweaver isn't going to give you the whole picture.
The mechanic analogy is a good example. Dreamweaver is a tool, I use it sometimes myself to help automate some repetative code or the like. But without having an intermediate knowledge of how the code works on a site, the tool is useless.
I'm actually still learning, myself. Going to try to get into the advertising/graphic design sector as soon as I finish my general education requirements (CSU). Make no mistake, coding isn't a shortcut factory, but knowing how things work, and knowing how they work together. That's were the best developers come from.
And lets not forget design; as far as that goes, a few good books on the aesthetics of web design, and maybe even general art will go a long way in giving that 'professional' look that you so desire; because believe it or not, most of the professional designers I know (here in San Francisco) don't actually use WYSIWYG programs. I know one that still codes with Notepad. Says it makes him feel alive.
and it always turned out better than everyone else. any old fool can pull out dreamweaver, add a little bit of code, and make a website. if you want to be a developer, take the time to sit down and learn the code. i am only 16, and i started learning html when i was about 13. i'm still not great, but i can make a fairly decent website. it takes time to learn everything. and when ever you get stuck. http://www.w3schools.com is extremely great. if you like how dreamweaver does something. do it in there, look at the code, and try and learn it. and if you like how a site does something, view>source code. 
