WYSIWYG editors add a lot to a web developer’s repertoire. They allow you to do certain tasks more quickly than you could type them by hand. For example, complex nested tables with many rows and columns are often easier to write using a visual editor than by hand.
Dreamweaver offers a lot of tools within the editor to add features that can be tricky to write by hand. One of my favorite uses of that editor is for creating DHTML animations. You place the image you would like animated and then drag it to where you want it to move. Then you simply set the number of frames in the animation, and Dreamweaver writes the script for you.
Whether you use WYSIWYG editors or write HTML from scratch, you’ll get decent results. Keep in mind that most hiring managers still want someone who can edit the HTML, but it’s not hard to learn, and you’re at the right site to start.