It’s a common misconception that the point of Rust is just security. Rust helps avoid a very broad class of bugs, that security bugs are only a subset of.
It's like a JRPG that may be a slog at the beginning, but then really gets going after the first 50-60 hours. Just gotta replace the hours with years, and huff even more glue.
And these are the people moaning about Rust and religious thinking... good old DARVO at it again, and it's growing more and more on the nose.
It's not just memory safety, but the design of the type system and error handling semantics that enable it to be smooth with exceptional behavior.
Java's issue might be the lack of cooperative multitasking until recently (virtual threads). Best you could do was those promises frameworks that mangle your code, and Google in particular uses something a hundred times worse called Guice (which is also DI).