I don’t know, maybe because rust is of interest to the wider Linux community and has been pretty much since its inception (https://lwn.net/Articles/547145/)?

And with the inclusion of rust in the kernel, and thus the kernel’s need to express its own abstractions and requirements (as well as the impossibility to use alloc and thus box) the limitations (ergonomic and otherwise) of “userland” smart pointers are more salient and relevant than ever.

LWN.net doesn't exclusively cover Linux kernel issues. From the FAQ,

What is this LWN thing?

LWN.net aims to be the premier news and information source for the free software community. We provide comprehensive coverage of development, legal, commercial, and security issues.

https://lwn.net/op/FAQ.lwn

We have Rust in the kernel now, of course the language that Linux uses is relevant.