Thanks. Looks like I wasn’t really thinking Force Dead after all. Maybe Force deficient? Do “non-sensitive” beings have a scale of Forceness? Or are they all lumped in the same?
There's no "official" ranking we adhere to if that's what you're looking for, but, if you look at the "
Force Sensitives" pages on the Wookie there are a variety of avenues that you can take to mold your character in a way that might make sense. A "
midi-chlorian" count could be used to determine how "strong" one might be in the Force, which, you could argue that a "lower number of midi-chlorians" might result in less powerful force-sensitive. So, perhaps that could be the reason for a specific ability remaining while others seem beyond their reach?
The degree to which someone can "harness the force" usually determines what they can do. What you're talking about reminds me of
The Archivist who was a Force-Sensitive but they weren't really strong enough to use it. They could sense it, though. So in essence limited to
one ability.
Strength in the Force usually (of course, there exceptions) doesn't just manifest out of thin air. A person could be force-sensitive but without training, faith, knowledge, etc their connection to the Force could remain limited or dormant. That could be a pretty easy reason to...Lack of training.
I don't like to get into midi-chlorian "numbers" too much because min-maxing that often seems to limit stories when we're a wide-open sandbox. I don't think Force Dead is really the correct term, but, you can certainly make an argument for it given the vague
description and lack of information on the Wookie. The best information and examples we have on it from Canon are definitely found in
Yuuzhan Vong lore.
A personal example would be this character, Srina Talon. When she first came to Chaos she was limited to
very few aspects of the Force. One of them was "Cryokinesis" which was learned via knowledge passed down through her family line. The Force itself isn't usually that specific. It was simply because that was all her family knew
how to teach. The sensitivity was there but a lack of training, etc, led her to a very narrow specialization for a very long time. She eventually expanded her horizons but it was gradual.
Characters can have all the potential in the world, but, it's up to the writer to determine how they use (or don't use) it.
Hope that helps!
