Why did the monks keep the chronicles?

The monks had everything they needed to keep the chronicle. It should be noted that in addition to monks, rich people and rulers were also proficient. But not all the rich knew how to write and read. Historical records were considered by many to be a waste of time. The common people were illiterate. The church received funding from the people and from the rulers. It was in the church that various knowledge was concentrated. The monks had a lot of free time, they were literate. Cultural and informational exchange took place between the monasteries.