I don’t see how continuing the fight is going to lead to security guarantees for Ukraine. A peace deal or ceasefire could at least allow individual countries to send peacekeepers independently of NATO. There are ways to deter a future attack outside of full membership. And if a ceasefire ends up being just a chance to regroup, then at least Ukraine gets that chance as well. As we saw during Ukraine’s “counteroffensive,” well-fortified positions are extremely difficult and costly to break through.