"No one sews a patch of unshrunk cloth on an old garment"
To try to apply many of those specific instructions to modern society is not practical. Furthermore, it can result in the instruction being manipulated, and the universal instructions become corrupted.
"Neither do men pour new wine into old wineskins."
"No, they pour new wine into new wineskins..."
“Not everyone who says to me ‘Lord, Lord,’ will enter the kingdom of heaven, but only he who does the will of my Father who is in heaven.” (Matt. 7:22)