JS' foremost use is to serve ads. I block JS using NoScript. So, I conjecture that a lot of people block JS for the same reason.
Also, that sucks you were downmodded so much without replies.
Edit: I guess you could use GMail, but without the fancy look.
Email is used for many business transactions, and for other types of meaningful communication between people. So, it can be estimated that email tends to enable profit due to this relationship-building and information-carrying ability.
And for simply being wrong, rather than offensive, a troll, or whatever.
It seems some people disagree with your sentiment.
With a mouse (to downmod) and no keyboard (to enter the discussion), I'd just assume they hold a lot of contempt for you blocking everyone's wonderful javascript.
@topic:
I agree with Hexstream above. It's still important to simply not rely on the javascript, css, etc. Make the logic and interface simple and upgrade to "bells and whistles" mode if additional features are available on the client.