I don't really thing the security 'guarantees' of rust matter that much.
I think it's a better language to work in than C or C++, though. That's not a reason to change utilities now, but a larger Rust ecosystem is always better in my humble opinion.
Yes that’s the major selling point in the Rust language in my opinion. Memory safety. Most of the security issues you hear about are because of mismanaged memory, specifically buffer overflows. My understanding is that Rust reduces risk of those by catching them at compile time.