You don't need a borrow checker to write reliable programs. If anything the Rust obsession with memory safety has been harmful since it detracts from general safety. But don't take my word for it, maybe consider what the co-author of The Rust Programming Language, 2nd edition has to say [1].

If you really care about writing robust programs then focus on improving your testing methodology rather than fixating on the programming language.

[1] https://steveklabnik.com/writing/memory-safety-is-a-red-herr...