Lost as to the purpose of IPFS without authentication

While already impressive in terms of speed and ease of use i am lost to the purpose of IPFS.

If it is to offer files for fast delivery across the world, congratulations. I think of it as a much better bittorrent then which it really is already. Please advocate with major browsers to offer it as a default.

Unsurprisingly, event today, I do not see any documented approach to offering authenticated content. Assuming encrypted volumes will bring adequate authentication to the table is not exactly how people would expect authentication to work. I would prefer people to simply not know a file is even accessible.

I look forward to a way of isolating and sharing data, which i do not think of as a simple feat to attain. I’d like to learn more about how IPFS is addressing this functionality without creating notable botllenecks.

Sounds somewhat alarming.
Does the lack of authenticated content enable attacks ?
Or is this more a data management thing ?

Most of that was well above my paygrade, but I’m interested as a journalist in hearing about potential flaws, and how they are responded to. I’m treating this forum as private, and off-the-record, unless permissions given.