“”The glock striker is not under tension until the trigger is pulled.””
“Didn’t say it was under tension.”
By definition a half cocked gun has it’s hammer under tension and is prevented from firing only by the half cock notch. By analogy, for a glock to be half cocked the striker would have to be under tension.
When the trigger is pulled, all 3 safeties are disengaged, and the striker is pulled the other half of its travel then released.
Being "half-cocked" is precisely why the Glock trigger feels better than a true DAO; it only has to do half the work of a DAO.