We don't need to have the Book of the Law always on our lips. We're not under the old covenant. The 613 parts of the Jewish law have passed away. So we don't have to marry our brother's widow if he dies childless. We can't stone blasphemers or people caught in adultery. We no longer have to keep the Sabbath or provide animals to sacrifice for our sins.
FYI, Careful saying things like "The 613 parts of the Jewish law have passed away."
They include things like
See, now only 609 have "passed away"... unless we continue to read.
Careful with those blanket statements, and I only provide this as some food for thought. You listed some things, but certainly overlooked others. If you know that Christians shouldn't sleep with their aunts, prostitute their daughters, disrespect the elderly, or eat meat with blood in it, then you'll realize that God's laws are good.
Those pertaining to the old priesthood and physical temple may not be in effect, but we don't need things reiterated in the new testament to know that they are good laws. For example, "You shall not curse the deaf, nor put a stumbling block before the blind, but shall fear your God: I am the LORD." (Leviticus 19:14). The new testament never says not too trip the blind as far as I am aware of, yet we know that we shouldn't... 608 now...
On a side note, I hope that you are doing well and staying safe. Nice to see that you are still out there somewhere @barncat