Nothing is "entwined". I can download kubo and run it without even knowing what Filecoin is. In fact, every user of Brave browser does it. Same thing for projects like OrbitDB. Same thing for customers of Pinata.
I can download F2FS and run it on my RAM. That doesn't mean that F2FS isn't entwined with NVMe SSDs.
In fact, while F2FS is a ludicrous example, this happens regularly with filesystems. The core design of filesystems is still built assuming that a block device will be behind it. IPFS is the same way, just s/block device/blockchain/.
