As other people have mentioned, olive trees are native to the Canaanite region so they strongly feature there because that's what people were used to seeing. Bu

As other people have mentioned, olive trees are native to the Canaanite region so they strongly feature there because that's what people were used to seeing. But to add to that, you'll also see a lot of mentions of Cedar trees (with some psalms and songs describing how the "voice of god" shakes the cedars in the mountains of Lebanon). Lebanon cedar was incredibly famous in antiquity for its resilience. Egyptians had it imported for buildings because they didn't have naturally growing trees that were as sturdy as Cedars. It's interesting to note that Yahweh in the bible still holds that old thunder association that the original canaanite deity had, and that cedar seems to be to him what oak is to european thunder deities (oak is very much associated with Jupiter/Zeus/Tarannis).