There is no way for you to make sure that `null` was "set" intentionally and not due to a bug or other kind of failure. Meanwhile if you see a `None` value you

There is no way for you to make sure that `null` was "set" intentionally and not due to a bug or other kind of failure. Meanwhile if you see a `None` value you know for a fact that it was set by your software and if you actually encounter a `null` you know that something went horribly wrong. Strong type systems and a few overheads in favor of better bug detection/prevention are popular for a reason.