I have seen people wanting to do Java, and while I personally prefer rust, I do see why.
Outside of the entire Sublinks discussion, it’s important to note that Java is not just Java anymore either. Kotlin offers many of the same advantages syntax-wise that Rust does (including the lack of null), and has access to Java’s excellent ecosystem.
Ultimately, it is up to people to decide what they want to use. Regarding of your opinions on Java or Rust, it is a valid choice either way for this type of software. It’s a personal choice.