seven minutes to midnight

there are still more than 20k warheads on this planet and the doomsday clock has been moving closer to midnight again:

"Little progress is made on global nuclear disarmament. The United States rejects a series of arms control treaties and announces it will withdraw from the Anti-Ballistic Missile Treaty. Terrorists seek to acquire and use nuclear and biological weapons."

why are we not worried anymore? the threat is as plausible as it was 20 years ago.