Not saying you are wrong, but I think your examples are all a bit interesting (in a good way):
Misspelling a key while encoding to JSON: In a system with JSON in it, the JSON part of the system I would consider to be a part with dynamic types. So, that errors can be introduced in a part of the system that is using something resembling dynamic types can be seen as the result of moving away from static types.
Adding two values where you should have subtracted: In general, this can't be detected by static typing, but there are also examples where it can (for example - try adding two pointers in C - this is a type error because only subtraction is supported)
Forgetting to log an error: Personally, I don't see this as practical at the moment, but if the popularity of rust means that linear typing because a bit more "normal" to people, then having errors where it is a type error to not use them is a possibility.
Personally, I'm a believer in using languages with simple static type systems, but pretending they have fancier type systems by the way of comments and asserts. Sure, a compiler can't check the invariant you mentioned in your comment, but with the language tech we have at the moment (and I would guess for the foreseeable future) a typical human can't understand a moderately complicated invariant that a compiler can check.