I haven't done much Rust, but why isn't there a safe way to do some of this implicitly? If you don't want to think about errors and just want to crash, then I feel like there should be a sane way to crash the script with a default error message. Could you write a thin abstraction to achieve this? Maybe there could be a new crate called "rust-script" or something, where the goal is to write code as easily as Python or Ruby.

Again, I'm not a Rust developer, but it's not hard to imagine an abstraction (or even a transpiler) that makes it easy to read a file, parse it as JSON, and do something with the data.