If the RSS reader you're building has no guarantees of working it has no value to anyone. Not all software needs to try and be bug free but all software should strive to minimize the number of bugs in it.

Static typing helps to minimize bugs (when used correctly) by allowing function contract declarations and reducing the build up of defensive guards over time. I've seen code in dynamically typed languages with lines like `if (!foo is integer) raise;` which basically equate to onerous home-built static typing.