And every one of those I've looked at in my area required a clearance, and wouldn't consider "clearable". You can't get a clearance without having a job that needs it. Without a clearance, you can't get a job that needs one unless the job accepts clearable candidates.

By requiring a clearance they are fighting for people from a very limited pool. If they really want to fill those jobs they'd allow clearable candidates, which would allow them to pull from a much larger pool.