It is relatively easy to argue that people watched obvious phenomena with practical utility, like solstices. Claims for non-solar alignments, without a strong practical motivation, must at least make statistically significant cases. To the extent that such hypotheses help organize archaeological data and suggest additional research, they contribute to the discipline. If successful, such hypotheses can move archaeological understanding beyond what was done to a piece of the why. Even with all of the buffering offered by modern urban society, the cycle of seasons cannot be ignored.
Hunters prosper if they anticipate the arrival of migratory game or fish, to prepare nets or blinds.
Farmers want all possible precision for planting. More sophisticated farmers, who use irrigation, may be able to plant early and obtain an extra crop, if they know the seasons well enough. It is beneficial for any group to know how long it will be until more food resources become available. While calendrics are a particularly well motivated reason for studying the sky, it has been watched for other information. It provides guidance to nomads and sailors, particularly those traveling into new areas with few landmarks.