This is what the WTS leadership has always done. Russell felt that he was the only one who could interpret scripture, and he claimed that reading his Studies in the Scriptures books was better than reading the Bible. The GB interprets the Bible for the rank-and-file, and they discourage JWs from coming to their own conclusions.
When they talk about what 'the Bible does not say,' they are stepping in to fill in that blank, because they believe themselves to be divinely inspired and the only source of light. Even with the occasional confession that they're mere fallible men, they want the rank-and-file to see them as the only reliable source of Biblical interpretation.