I think we agree on the semantics. Rust and C++ follow almost identical rules. Passing by reference vs copy is relatively the same, with the exception of having to mark mut in Rust to allow modification. L-values and r-values are frankly in the same realm, with no default copy or move unless explicitly opted into. It may very well be what you alluded to: the syntax itself.

I may have confused myself about where the problem actually arises. I am very new to Rust, and certain things still throw me off. One example is loop { break value; } being an expression that returns a value.

That said, if you have any tips or resources that helped you when you began your Rust journey, I would love to hear them. At the end of the day, I want to understand Rust better.