Typing when you need it gives you more freedom over a toggle. You can choose to type some parts of the code while leaving other parts untyped.

For example, if I’m writing a quick and simple Python script I may forgo typing, but when iterating on it I’d go back and add the types I need.

Python 3.x will never have static typing because that would break backwards compatibility.

However, typing hints have been Integrated into Python for a while, and you are heavily recommended to use them, so your IDE can enforce typing.