That's because W3C's goal in having a cryptography standard isn't security, but rather interoperability; they see encryption as another step towards making the web a first-class application development environment. Without it, they can't get Netflix to run on pure "open" web technology.
It's unfortunate, because we could use a secure browser crypto interface much more than we could use better browser interoperability with random non-web technology. But our industry is, of course, fundamentally unserious about security.
It's unfortunate, because we could use a secure browser crypto interface much more than we could use better browser interoperability with random non-web technology. But our industry is, of course, fundamentally unserious about security.