While we should try to understand all scripture, what is important in the scriptures is clear enough. While the exact meaning of John 3:5 is debated, the message of John 3 is clear. While the meaning of Abraham's bosom may be unclear, the message of the parable of the rich man and Lazarus is clear.
While I believe you are seeking to do God's will, do you not find that seeking to justify sin is what causes people to grossly misinterpret scripture.
The Jews therefore marveled, saying, “How is it that this man has learning, when he has never studied?” 16 So Jesus answered them, “My teaching is not mine, but his who sent me. 17 If anyone’s will is to do God’s will, he will know whether the teaching is from God or whether I am speaking on my own authority. 18 The one who speaks on his own authority seeks his own glory; but the one who seeks the glory of him who sent him is true, and in him there is no falsehood. 19 Has not Moses given you the law? Yet none of you keeps the law. Why do you seek to kill me?”
(John 7:15–19, ESV)
Scripture is meant to continue to correct and improve our lives.
All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness, 17 that the man of God may be complete, equipped for every good work.
(2 Tim. 3:16–17, ESV)
As scripture is less clear we seek what is most probable not what is just possible.
Conversely, it must be admitted that most heterodox (whether theological or exegetical) positions are built upon what is possible; but whether they are probable is a different matter. Just because a view is possible does not make it likely in a given text.
Wallace, D. B. (1996). Greek Grammar beyond the Basics: An Exegetical Syntax of the New Testament (p. 10). Grand Rapids, MI: Zondervan.
Hopefully, with our questions and answers, we are learning and growing in Christ.
P.S. Sometimes in John there is intentional double meaning. For example, in John 1:5 κατέλαβεν can mean overcome or comprehend like the word grasp. Overcome fits the meaning for literal light and dark, while comprehend fits the meaning of light as knowledge. In John 3:3 ἄνωθεν can mean above or again. The Peshitta translates this word with the same root as Hebrew רֹאשׁ which can have the same meanings. Thus, the ambiguity in the Greek probably reflected Jesus' words.