I mean, a rusty USB port is pretty on-point here. It's not often that the perfect stock photo pun exists, you have to take it when you get the chance.

Well, the big claim is that it is memory-safe. This means that things like null pointer references, double-free errors, and use-after-free errors shouldn't be possible.
There's a ton of reading to be done if you're interested, just search "rust memory safety" for a start.

The photos having rust on them are because the authors are quite lazy and they need an image.

So they just look for copyright-free images of a rusty USB and they’re all set.