Why did Lu Xun worship sika deer instead of Confucius when he was studying?

The picture shows ancient trees and deer. Ancient trees are homophonic with "ancient books", and deer is homophonic with "Lu", which means that you can get paid for reading ancient books. At that time, "learning to be excellent is to be an official", and studying is to be an official and get paid to realize the life ideal of governing the country and leveling the world. So it is ok to worship ancient trees and sika deer.