No first use is an imperfect, squishy sort of half step, but it’s a start. It brings the world closer to Further it gives the opportunity for further negotiations.
Now, we walk away from treaties. We stop honoring commitments. We are going to show the world how an arms race is won. Nobody wins an arms race.
Long ago Halloween was a very solemn pagan occasion steeped in mystical beliefs. Eventually the Catholic church co-opted the pagan day and made it a very solemn ordained occasion steeped in mystical beliefs.