The most extreme content is not being cleared without the use of parsers, unless you believe that dungeons are the most extreme form of content? Most, if not all serious raid groups parse. That's how they recruit DPS (not only parse numbers of course, but their ability to deal with mechanics). They don't use an official parser because that's not an option as of now, but I'm sure console players would absolutely love access to a parser. I think they should implement a public parser for Extreme & Savage content, other content doesn't need it.
Regardless of all that, a parser that's allowed by the game rules will happen with the addon API is implemented as I've stated earlier, and it will be available for use in all content. Harassment still won't be allowed, and you will be reported for doing so, now and then.