The issue is that you find you very often want to break those roles. Python basically has `elif` because `else if` would make each branch nest one level deeper which isn't what one wants, except Python uses exceptions for flow control so you find yourself having to use `except ... try` as an analogue to `else if` but not `excetry` exists to do the same and stop the indentation.

There are many other examples. It exists to give people freedom. Also, while humans only go by intendation it's very hand for text editing and manipulation without requiring special per-language support to move the cursor say to the nearest closing brace and so forth.