Yeah, this is a common source of confusion, and the ipfs.pics tagline doesn't really help the situation. Personally I'd change it to "where you can ensure your pictures will be available forever".

You shouldn't read "permanent" as "eternal", but as "not temporary" --- in the same sense as "permanent address" or "permanent employment". HTTP is temporary in the sense that you're relying on a single server to actively continue serving a file for it to remain available. IPFS is permanent in the sense that, so long as the file exists somewhere in the network, it will remain available to everyone.

Edit: If you want to ensure your content remains available, you still need to host it somewhere (your own server, convincing/paying someone else to, etc). IPFS isn't so much about storage as it is about distribution.