So, I'm trying to blow up the distinction between stasis and dynamism. There is no stasis, I'd say, echoing Heraclitus. This means there are no individual objects.
I learned in high school at some point that perfect circles don't exist in the real world. This is true. Numbers can't be found either. If I want to say there are two apples, I need to show that they're exactly the same. Identity is a useful tool. I'm inclined to a call it a fiction, though I'm certainly not arguing against it. The human ability to take two parts of the world and consider them the same thing, so that they may be counted, or to use any abstractions and consider their relations is a product of evolution.
I'm not trying to say abstractions are baseless, that it's all a dream. They're one way the world relates to itself: the eyes and brain relate to the apple. But see there I'm using the concepts "eyes," "brain" and "apple." What exactly can I capture about them that adds to their ridiculously complex non-conceptual relation, which I would suggest includes far more than brains and apples as we know them?
It's emotionally satisfying to understand, it's emotionally satisfying to form and achieve goals. There are ego benefits, there's relief from cognitive dissonance. It's an aid in survival, up to a point anyway (the humans being at risk of self-destruction), to use abstractions. You can say the same about sex.