That effort is driven by those expending it so that when they choose to disregard the explicit writings of Paul, they can say that they are not disobeying God. While I do not agree with their positions I am humbled by their integrity. Rather than simply ignoring a clear directive in Scripture as some in the Church do, they are at least trying to justify, albeit erroneously, their choice.
The problem is that sets those who choose this path as judges over scripture. What is and what is not. But in a sense we do that as well. When we choose to ignore or disobey what the Scripture plainly says, we are judging what we think is important and what we deem not so much. Judging. So for both choices it comes down to can we really trust Paul. By extension the question is can we really trust the Holy Spirit inspired Paul. Can we really trust the Bible?
Far too many choose the wrong answer to that question.