Earlier quoted context omitted.
One could argue that dynamically typed code is often shorter, and therefore both easier to reason about, and possessed of fewer bugs on a bugs-per-line basis. Not really keen to push that line of reasoning myself, just helping picture one possible argument.
This is true in a local context, but entirely breaks down when a codebase becomes larger than a single person can fit into their brain-RAM. Not arguing or saying you're wrong - just presenting the very quickly reached boundary where the argument breaks down.
It's not just local context. Reading a dense book is still more difficult than reading a less dense book, given a fairly similar amount of information and style in conveying that information. Larger codebases suffer the same problem you mention in a different way, and cargocults in most static languages tend to advocate very verbose writing styles.
Where this falls apart, the more verbose writing style hasn't been proven to convey more information or in a better way. That's an assumption still tossed around.