That's what they sometimes say but the world is from Satan so would you really trust their material when FDS provides you with banquete of spiritual food. Really, any old wts material is hard to find, not mentioned, so how would a sincere JW know what's in the old wts publications if they never visited xJW sites or talked to xJWs? A sincere JW doesn't know what to look for and where to look so in their mind they don't even think the information is controlled to them.
They also sometimes say that the world will be judged by Jesus or Jehovah but they ignore all the wts publication that point out that only Noah and his family survived and all other illustrations pointing to the fact that only God's chosen ones survived calamities and we all know KHs are the ark..... So to the outsiders they say one thing while it's obvious when they talk amongst each other a different message appears.