I honestly don't know of any web browsers that don't support CSS in the fist place
No. CSS3. CSS and CSS2 are fully supported by today's browsers, but CSS3 isn't planned to be fully supported until 2011 and even then it's sketchy. CSS3 has some great stuff such as border image backgrounds and the ability to stretch a background to fit the screen depending on the users screen resolution (god that'd help here

) I personally can't wait.
As for HTML it's stable, you don't have to worry about compatibility, you don't get confused when you try to do something and it doesn't work

, it's a heck of a lot cleaner, when you want to edit something you don't have to go scrolling around and looking for CSS elements, it loads faster than CSS, you don't need a server to host external style sheets, and almost anyone can edit it. CSS just isn't there yet. I look forward to 2011 when I can throw it all away and embrace CSS, but until then I'll have to stick with my good 'ol HTML.
It also might depend on how fast you can type HTML elements. I've been making web pages since I was 7 years old so I have all the keys memorized and the commands are quickly in view. When you want to center something in CSS, you have to create a DIV or associate the element with a class then go make tags in your freaking style sheet and finally choose one of six ways to center the darned thing. In HTML all you do is make little <center></center> tags and you're done. Sure if you're going to make all the pages virtually identical it's better to just use CSS, but if you're going to make a real website that's interesting and not a snore it's faster and more efficient to use straight HTML.
I for one don't use Dreamweaver or any other assistant program. I coded this entire website from scratch in Notepad. You can't rely on programs like that because one day you're not going to have them and you're going to be faced with an emergency. What do you plan to do then? It's best to learn how to do most of the computers work yourself and become proficient at it so when the time comes you can do it yourself. Besides......if I need to code something in an emergency I can do it on ANY computer whether it be a PC or a Mac or even a Windows 95 computer.
In my opinion, if you're using Dreamweaver or any other assistant program you've slapped the training wheels back on. You're not always going to have those training wheels though and what are you going to do then when you need to get somewhere fast but you can't ride your bike 'cuz you don't know how to ride it without your training wheels? Besides.....once you go learning it all by scratch you'll figure out that all that time you spent trying to cheat using assistant programs was just a waste. With only a bit more effort you could have done the work yourself and not had to rely on any stupid program for what you need.