>But maybe this is a tooling problem? What if we could see the code in a simpler way even if the actual code involves macros and templates?

Intelllij Rust plugin does this.

    println!("Hello, world! {}", x);

    >Recursive expansion of println! macro:
    >{
    >    ::std::io::_print(IntellijRustDollarCrate::format_args_nl!("Hello, world! {}", x));
    >}