IronWolf said:
VB is evil.
I find VB confusing to look at... It just seems so unordered in my eyes (largely, I suspect, because it doesn't use curly braces and such). I expect that, if I do get into Python, I'll have similar problems. But I digress.
Ultimately, WYSIWYG isn't totally useless for everything... Like anything else, there are no absolute answers for what's best and what's isn't. However, there are some very compelling reasons to avoid WYSIWYG editors.
1: As mentioned, what you get is not what you see. If you're doing a layout that needs to be pixel-perfect... well, first, check and see if you really do need a layout that's pixel perfect. Chances are you don't. But if you do, a WYSIWYG editor just won't work for you.
2: Limited capabilities. Unless you're making an incredibly simple, static page, you're going to want to do something that you can't do.
3: They produce code which is not very portable. If you ever have to take over someone's code, or someone has to take over yours, you better hope you're using the exact same version of the exact same software with the exact same settings.
4: They produce ugly, unmanageable code. As mentioned previously, you are going to have to have to get into the code at some point, and it's not going to be pleasant. Poorly structured, random whitespace, redundant tags...
5: HTML is easy! CSS isn't much more difficult! You can probably learn the basics of the two in 10 minutes without ever having looked at a line of code in your life and you'll be ready to start! With just simple HTML and CSS you can play around and finesse out what you're looking for with more control and more easily than with a WYSIWYG editor.
The fact is, there's no right answer for everyone, and just because most people do something doesn't mean that that's the best way to do it. But I feel quite strongly that WYSIWYG editors are just a bad idea.