The noble families don't like the lamp bearers because the lamp bearers restrict what they can do with their spirit spring, stop them from attacking other towns, and, most importantly, have won the hearts of the people.
This third reason is the most important one because it concerns the foundation of power of nobles. It is not just about luxury and freedom of nobles anymore.
Every noble family must have someone in the Knight Pathway because the godclads of this pathway become stronger the more people and soldiers they have in their army. Knights can become so strong with the support of the people that they can fight people two ranks stronger than them.
Nobles with the knight pathway used to be very strong. In fact, the god of justice was also a knight. It was with the power of the Knight pathway and the pathway of justice that the god of justice used to kill the god of blood, who was said to be the strongest true god.
