Absolutely static typing helps you be a better programmer. No programmer is infallible, and static typing helps you catch a large class of your mistakes sooner -- at the moment you write or compile them, rather than at runtime or never.
The author's reasoning is quite poor. They don't even concretely define what it means to be a "sharp" programming tool.
The author's reasoning is quite poor. They don't even concretely define what it means to be a "sharp" programming tool.