I think many people who have at least once first prototyped a numerical algorithm in a high-level language (say Python, Julia, MATLAB?) and then implemented it in C, can relate to the experience of transitioning from error messages of the type: "dimension mismatch for XYZ" to "segmentation fault". That's in my opinion a strong motivation to build tools that can automate certain parts of the development process.

Writing C code directly is as a good option, as long as your code is not too complex to develop, maintain and extend.

And, again, Python here is intended to be the host language for an embedded domain specific language that gets compiled into C. It does not need to be efficient it needs to be expressive and easy to analyse and transpile.