Scholar,
If a careful study of eschatology leads you to conclude that the choosing, by Jesus, of the Bible Students under Rutherford occured in 1919 I would be interested to know who the theologians you have been studying under are.
The simple truth of the scriptures, and chiefly the words of our Lord Jesus, are there for all to freely understand, there is no need for "Gods people" to explain them to you, open the word of God and read it ,after asking the Holy Spirit to guide your thoughts, and you will find the truth.
The Apocalyptic literature,written as it is in symbals, is open to all sorts of fancifull interpretations, but these are of no value in leading the Christian life,wait and see is a good motto. As you say , be busy in the Lords work is what we should be doing, not supporting crazy explanatons of scriptures that have not yet come to fulfillment.
Love
Wobble