The following is a section taken out of the article linked at the end of my words. The WTS has said that one cannot understand or have prayers heard by god without going through the Watchtower organization. The whole article is lengthy, but the author tries to show the history of this teaching from the beginning of the Watchtower organization self-proclaimed as the only one blessed as god as the only true one. https://jwfacts.com/watchtower/organization.php
"The concept of Jehovah having one single organization that he directs by means of a Governing Body is used to support the concept that being a Jehovah's Witness is essential for salvation. Though the Bible consistently says it is faith in Jesus that is important, Watchtower shifts attention to the Organization with statements such as "we must uphold the truth of that organization." (Watchtower 1961 May 1 p.276) The Governing Body uses this principle to set itself as a spiritual authority above the Bible, such as when stating:
"Thus the Bible is an organizational book and belongs to the Christian congregation as an organization, not to individuals, regardless of how sincerely they may believe that they can interpret the Bible. For this reason the Bible cannot be properly understood without Jehovah's visible organization in mind." Watchtower 1967 Oct 1 p.587"