If you've read the quote where they say that then you've already read the rest of it where they basically say they don't care. They don't design raids to only be done by the 1% that go in undergeared and need healer dps. They design it for a higher gear level where healer dps doesn't matter, so that a larger portion of the playerbase can actually go in and complete the content without feeling like they need to do more than what their class was designed for.
Because, you know, they're in this to make money so making the most amount of players feel like content is within their reach is important. If you expect them to change the way classes and raids are designed just for those world first/first week clear groups, then Wildstar's failure would like to say hello.
I'm not saying you can just go and change people's expectations, but they balance the game with certain ideas in mind so if you're playing in a different manner than intended, you're going to have to expect different results.
