People seem to not notice or just outright ignore that.
The Sermon on the Mount sets the bar far higher than the Ten Commandments. The Ten Commandments deal with outward actions. The Sermon on the Mount gets into the intent of the Law and the intent of the heart.
The Pharisees who kept the outward observance of the Law, and Jesus had some pretty harsh words for them. Vipers and white washed tombs full of dead men’s bones comes to mind.
Correct. Which is what the New Covenant addresses. Instilling the Holy Spirit in our heart to fortify us to keep His Laws inwardly as well as outwardly.