Comment by Philpax

People who become proficient in Rust generally enjoy the syntax, so they want to carry it across. (As someone proficient in Rust who has pondered their ideal scripting language, I would have done the same.)

To your more general question: it depends. AngelScript [0] looks very much like C++, while others, like Lua, don't. It's really up to the designer's discretion.

[0]: https://www.angelcode.com/angelscript/, but https://angelscript.hazelight.se/ has better examples of what it actually looks like in use