To be more specific - if shit goes hot, its not gonna be a global thermonuclear war, its gonna be another Korea or Vietnam in principle - Neither side will want to bring the fight home or push their oppositions homeland, and are content to proxywar in the country in question instead. Nobody wins by flying troops and bombs over Moscow or DC, but Kiev is fair game.
I don't think Biden is willing to actually pull the war card though - Too weak, and too destructive to what little he has achieved. Anyone framing it as a distraction from the homefront is forgetting the fact that war makes the homefront worse, then the people start hardening and adapting. The cucks are already cracking under not seeing movies in theaters, they're not gonna harden up when soy disappears and their vegan ass is given a pork ration to stretch for a week.