The above line is a typical dismissive approach to morality, holiness, truth,
repentance, confession, theology, teaching, reality.
If the point is awkward without an obvious answer you like is it old covenant
or new covenant? Reject OC, accept NC. This is just a way of denying God.
I have seen this in Islam. You have a formula in life. You apply it without
regard to anything else and you get your result, suicide bombers, murdering
your enemies, absolute authority where to argue is death. This has never
been Gods way.
Gods way is to present you with a choice. And then you learn as you walk
one step at a time, until finally you arrive.