Because of some of the early archaeology finds. Which included tools like sickels and grinders. Kebarans are often characterized by the earliest collection of wild cereals. Some say, they could have been the first step towards the neolithic revolution. Its believed they practiced dispersal. In the summer, to upland environments. And, in the winter, moving to caves and rockshelters, near lowlands and lakes. Given archaeologys tools, shelter, habitat and farming discoveries. There diversions could be reasons for there livlihood, success and oncoming neolithic era.

Kebarans are generally thought to have been ancestral to the later Natufian culture (link). They may have occupied much of the same area and range. Building on the Kebaran specializations. Natufians, may have acquired symptoms of permanent settlements, and agriculture. Both have hints of origins, and of civilizations. They further advanced the use of cereals, grains and farming. Obtaining some of the specializations you see today.

Arts
Kebarans engravings closely resemble European finds. Keeping track of memories, and timing of seasons. For resources and previous finds. They may be interpreted as “systems of notations” or “artificial memory systems”. It is both early, and fascinating. Look at whats happening now with technology, computers, and artificial intelligence.
Groups of sedentary or semi-sedentary foragers started practicing agriculture. Natufians (link) were similar.

Engravings found in Ein Qashish South involve symbolic conceptualization.

They suggest that the figurative and non-figurative images comprise a coherent assemblage of symbols that might have been applied in order to store, share and transmit information related to the social activities and the subsistence of mobile bands.
They also suggest a level of social complexity in pre-Natufian foragers in the Levant.
The apparent similarity in graphics throughout the Late Pleistocene world, and the mode of their application support the possibility. That symbolic behavior has a common and much earlier origin.

Bibliography

Dayan, Tamar (1994), “Early Domesticated Dogs of the Near East” (Journal of Archaeological Science Volume 21, Issue 5, September 1994, Pages 633–640)

Roskin, Joel; Porat, Naomi; Greenbaum, Noam; Caracuta, Valentina; Boaretto, Elisabeta; Bar-Yosef, Ofer;
Yaroshevich, Alla (24 August 2016). “A Unique Assemblage of Engraved Plaquettes from Ein Qashish South, Jezreel Valley, Israel: Figurative and Non-Figurative Symbols of Late Pleistocene Hunters-Gatherers in the Levant” (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996494). PLOS ONE. 11 (8): e0160687. Bibcode:2016PLoSO..1160687Y (https://ui.adsabs.harvard.edu/abs/2016PLoSO..1160687Y). doi:10.1371/journal.pone.0160687 (https://doi.org/10.1371%2Fjournal.pone.0160687). ISSN 1932-6203 (https://www.worldcat.org/issn/1932-6203). PMC 4996494 (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996494). PMID 27557110 (https://pubmed.ncbi.nlm.nih.gov/27557110).

University of Edinburgh, Archaeology 1 Lectures, “From Foraging to Farming”, 2008 Retrieved from “https://en.wikipedia.org/w/index.php?title=Kebaran_culture&oldid=1144409892“

Kebara, paleoanthropological site on Mount Carmel in northern Israel that has yielded a trove of Neanderthal bones and associated artifacts. Encyclopedia Britannica