Basically a WTS tactic to connect survival of the GT with attending meetings.
2014 WT At that crucial time, Jehovah will give us lifesaving instructions, and the “inner rooms” might well be connected with our local congregations.
2016 WT These “inner rooms” may refer to our congregations. That is where we come together as brothers and sisters to worship Jehovah.
God Kingdom Rules book Note the verbs in this verse: “go,” “enter,” “shut,” “hide”—all are in the imperative mood; they are commands. The Jews who heeded those commands would have stayed in their houses, away from the conquering soldiers out in the streets. Hence, their survival depended on obeying Jehovah’s instructions.b
Isaiah Prophecy book #2
Note the verbs in this verse: “go,” “enter,” “shut,” “hide”—all are in the imperative mood; they are commands. The Jews who heeded those commands would have stayed in their houses, away from the conquering soldiers out in the streets. Hence, their survival depended on obeying Jehovah’s instructions.
WT 2009 In our day, the “interior rooms” of this prophecy could be closely associated with the more than 100,000 congregations of Jehovah’s Witnesses around the world. Such congregations play an important role in our lives. They will continue to do so through “the great tribulation.” (Rev. 7:14) God’s people are commanded to go into their “interior rooms” and hide themselves “until the denunciation passes over.” It is vital that we develop and maintain a wholesome attitude toward the congregation and be firmly resolved to stay in close association with it.