C++ also has constexpr functions, which can be recursive.

All code can have bugs, error out and die.

There are lots of good reasons to run code at compile time, most commonly to generate code, especially tedious and error-prone code. If the language doesn't have good built-in facilities to do that, then people will write separate programs as part of the build, which adds system complexity, which is, in my experience, worse for C than for most other languages.

If a language can remove that build complexity, and the semantics are clear enough to the average programmer (For example, Nim's macro system which originally were highly appealing (and easy) to me as a compiler guy, until I saw how other people find even simple examples completely opaque-- worse than C macros.