The Law is Mosissimus Mose. It makes us aware of our lack of awareness so that we beg (ps 19) for cleansing from faults of which we may not even be aware (as I construe it, anyway.)
But it is lovely, sweeter than honey. It is not only about justice as we understand it, but it is instructions on how to make your life work, how to be human.
And the Revelation of the Law is a mercy. It "proves" that God cares. And when the justice of God , as Luther says in nobis est, non nostra we find little gleams and glimmers not so much of OUR obeying the Law but of obedience happening in us.
Generic, cryptic, hurried remark:
What we're dealing with here has to do with "incarnation" and with "realized eschatology". MY view, with which I expect you'll disagree, is that before the parousia we cannot entirely dispense with sacrament. ceremony, tradition, and religious festival. This is the "not yet" aspect of the eschaton.
But because of the Incarnation, these seemingly pen-bound things are vehicles, "earnests", and foretastes of what the blessed will have in its entirety at the Last Day. Part of living in a time of dark and mirrored vision is being bound to a pen, in some respects. Part of the Love of God in this "in-between-time" is that the pen is full of blessings.
Suggest you pay more attention to the memes in John ch 10.. and into ch 11.. also in Jude.. The Sheep Pen may appear to be a "protection" but it houses also the "WOLVES".. and the posuers.. i.e. shills, fakes, phonies, and weasles.. And makes "the Sheep" wonder is that really a sheep?.. As they tread on sheep dung.. and smell the ammonia..
The pasture OUTSIDE.. has none of that..