[jerf]

It's true that functions that return (result, error) tuples are hard to miss the errors from, because you have to explicitly either at least accept it, or ignore it. It's both visually obvious that you've dropped the error and there are linters to catch this for you (which I highly recommend integrating into pre-commit hooks).

However, if a function just returns an error, but no result value, it is indeed easy to silently drop that error without realizing it by simply invoking the function and not catching the result at all. To which, again, I'd highly recommend using linters at commit time or even code save time.