IPFS isn't magic. Someone has to store it.
IPFS is basically Bittorrent plus a financing system. Arweave charges US$5/gigabyte for permanent storage on IPFS. This is supposed to be forever, funded by investing the money and speculating in the declining future price of storage.
You can supposedly put academic papers on Arweave's version of IPFS.[1] But if you try "Browse", nothing appears. This acts like another one of those distributed systems that isn't.
[1] https://ss6puabcq3ch.arweave.net/5Yeg3wT4COQL6Bz-tdp9xlmeiwg...