Best I can see is that it helps incremental time that adds up over time

Like if your build server is backed up maybe the rust version of your language's compiler and interpreter will make your build server not be backed up because it does everything faster

But for everyone else its not that useful to be using the rust version of everything

Its just another one of those things where you see lucrative job offers requiring rust, so you make up reasons to have impactful-ish experiences in rust