Why use a lunar calendar when you can count the solar calendar (24 solar terms) in ancient times?

Lunar calendars are not helpful for farming, and they also require intercalary leaps to regulate the correspondence of the seasons, which can be controversial and have to be constantly adjusted. What exactly is the benefit of a lunar calendar? Why didn't the ancients just use a purely solar calendar? Since they could already figure out the 24 solar terms. Lunar lunar calendar lunar calendar solar calendar seasons know users, students rely on the lunar calendar to know the tides, which is useful for fishermen and navigation.