I used that when submitting parental leave at work. I didn't want to provide full access to all my photos and files for work, so all they got was a folder with a pic of a birth certificate.
There's also the fact hardware remote attestation is creeping into the Android ecosystem. There's absolutely no way to daily drive something like GrapheneOS if essential services such as banks and messaging services start discriminating against you on the basis of it. Aw shucks looks like your phone has been tampered with so we're just gonna deny you access to your account, try again later on a corporation owned phone.
GrapheneOS is amazing from a security and privacy perspective but it doesn't matter. The corporations will not tolerate it because it works against their interests. They will ban you from their services for using it. Unlike Google and Apple, they have no leverage with which to force the corporations to accept terms unfavorable to them.
Apple is also pushing developers toward using native picker components. That way, you don't need to request consent at all, as you only get access to the specific object that the user has picked using a secure system component.
This is an interesting contrast with the earlier philosophy of phone OSes that the file system is confusing to users and they should never be allowed to see it.
From an user perspective, photos aren't files. Music isn't files. Contacts aren't files. Apps aren't files. App data isn't files.
The only things that "walk like a file and quack like a file" are documents, downloads, contents of external storage, network drives and cloud drives, and some Airdrop transfers.
Yes, it's technically possible to use the files app to store photos, music etc, but if you do that, "you're holding it wrong."