Why are most sites about flash not composed in flash?

I’ve always wondered this. If flash is really as good as html or some other web designing application then why don’t these sites use flash in creating thier own page?

www.kirupa.com www.flashkit.com www.actionsript.org

cause they are to good for that

Well if you’re going to have a site that gets updated frequently then it would be much more practical to have a HTML based site. Flash is used if you want to add a bit more flare and interactivity. www.kirupa.com has a bit of flash and so does www.ultrashock.com

A site that gets updated regularly would be a pain to update if it was built entirely out of flash.