You notably did not answer any of my questions.
In Deuteronomy 30, it forms the basis for the New Covenant by prophesying about a time when the Israelites will return from exile, God will circumcise their hearts, and they will return to obedience to the Torah, which is what Jeremiah 31:33 and Ezekiel 36:26-27 are in regard to. In Jeremiah 31:33, the New Covenant involves God putting the Mosaic Law in our minds and writing it on our hearts, and in Ezekiel 36:26-27, it involves God taking away our hearts of stone, giving us hearts of flesh, and sending His Spirit to lead us in obedience to the Torah, so those who want nothing to do with following Christ's example of obedience to it also want nothing to with being under the New Covenant. Jesus spent his ministry teaching his followers to obey the Torah by word and by example and the reason why he established the New Covenant was not in order to nullify anything that he spent his ministry teaching or so that we could continue to have the same lawlessness that caused it to be needed in the first place, but rather it still involve following the Torah.
In Hebrews 8:7-9, the fault that God found with the Mosaic Covenant was not with His righteousness or righteous laws, but rather He found fault with the people for not continuing in their covenant, so the reason why the New Covenant was needed was not in order to do way with God's righteousness and righteous laws but to do away with what was hindering us from obeying them. This is why the New Covenant involve God sending us His Son to free us from sin so that we might be free to meet the righteous requirement of the Torah (Romans 8:3-4), God taking away our hearts of stone, giving us hearts of flesh, and sending His Spirit to lead us in obedience to the Torah (Ezekiel 36:26-27), and God putting the Torah in our minds and writing it on our hearts so that we will obey it (Jeremiah 31:33).