I agree, to a point. I don't believe in common levels of maturity, or stages where this believer is behind or ahead of another in some common line of ascent. Certainly, one believer is more mature than another, but that doesn't imply such notions as, "I've been where you are."
But the study of the subject we have been pursuing, here, (or trying to pursue, at least), has everything in the end to do with the grace of God, which grace is the essence of the Gospel of Christ. That is the "weightier matter" —not the "milk" but the "meat". "1Therefore let us leave the elementary teachings about Christ and go on to maturity, not laying again the foundation of repentance from dead works, and of faith in God, 2instruction about baptisms, the laying on of hands, the resurrection of the dead, and eternal judgment. 3And this we will do, if God permits." It is that grace which is the meat of the whole of life, without which we are nothing. We are here to come to know Him.
I agree that we are not here to "figure it out". And discourse, discord and debate can (and usually do) descend into a lot of uselessness. In and of itself, "good works" is not the focus of grace, nor what we are to pursue above all else. What Calvin thinks about 'good works' is not of itself among the weightier matters. That I grant. But God's Word will not return to him void. And discussing what it says and what it means and what it is talking about, and discussing what God is doing/ building/ accomplishing, is always among the weightier matters.