I agree the rewrite everything in Rust meme is overblown, and the Rust evangelists can be insufferable. I also agree that, at a glance, Rust syntax is (in my opinion) quite ugly. Once you start using the language it makes more sense why things are the way they are, but it was offputting to me at first and I still think its ugly now.

However I don't think adding Rust support, rewriting old, critical components, using Rust for a new project, etc. are bad things. If someone volunteers to rewrite critical components in a way that eliminates (or significantly reduces) one of the most exploited and damaging classes of bugs, while also adding support for said way, then I don't see the problem. If someone opens a GitHub issue on your C++ project telling you to rewrite it in Rust, just close it and move on.