In a world where backing up to IPFS would be as easy and widespread as hitting Ctrl+D to bookmark and sharing backups would not be dangerous legally, your answer gets an easy answer.
Each person gets to decide what they find important, backup and commit resources to.
We already have the sharing technology (BitTorrent, IPFS), and the backuping tech (ArchiveBox, TubeArchivist). But they are not integrated and they are not easy to configure and use for a nontechnical person. And they are unlikely to become mainstream thanks to the copyright cartel.
Many years ago there was the dream of every home having a home computer giving people ownership over their digital life. A world where everyone has their own email server, their own diaspora pod for their family, their own blog, etc. etc. and all they had to do was buy or build a box and plug it in.
Projects like freedomplug and sandstorm.io and YunoHost and others. There are even newer projects like Umbrel. And of course NASs that now have apps on them.
Arguably, NASs and Umbrel are really easy to configure and use. OMV is somewhat harder but not unreasonable.
Alas, a self sovereign world is not what people desire. People are content with letting themselves be controlled by a few megacorps. Everything is in the cloud (someone else's computer).
Also, with the rise of botnets and DDOSs, it became unfeasible to self host something public without something like Cloudflare in front.
I miss the old internet.