I think you’re using the wrong model for what “have a purpose” means. purpose isn’t an attribute of a thing. Purpose is a relation between an agent and a thing. An agent infers (or creates) a purpose for things (including themselves). This purpose-for-me is temporary, mutable, and relative. Different agents may have different (or no) purposes for the same thing.
Locally maybe there is no purpose. But maybe it’s necessary for life to emerge elsewhere, so it could have a larger purpose.
If you isolate a napkin, it has no purpose but as soon as you need to wipe you mouth it acquires one. So maybe purpose is relative.
But yeah, looking at my original post, I’m trying to compare the purpose of the universe with the purpose of humans, which doesn’t necessarily overlap
I think you’re using the wrong model for what “have a purpose” means. purpose isn’t an attribute of a thing. Purpose is a relation between an agent and a thing. An agent infers (or creates) a purpose for things (including themselves). This purpose-for-me is temporary, mutable, and relative. Different agents may have different (or no) purposes for the same thing.