I don't know if this an argument for or against static typing and type safety but there are two sides to this coin.

In dynamic programming languages it is definitely easy to get shit done, at least initially.

However as a project progresses to the point where a lot of refactoring takes place and there's more than a handful of people working on it, a good static typing language will make sure that shit keeps on getting done and things won't break due to a subtle typing error. Things will be caught by the compiler even before you get running the test suite.