I have never seen a blue whale yet I know they exist because others have seen them.
You obviously haven’t looked through code bases in other languages if you never seen these issues outside of python. Personally I have observed them in C, C++, Java, Haskell, R, Python, PHP, JavaScript , Matlab, Maple, Mathematica, Rust, heck even in lab view. And the same type of problems even translate to poorly developed excel sheets.
The only plausible explanation for you never having seen any such issues outside of python is that you have never looked.