As long as Russia retains even a toehold in Ukraine, NATO'll say conflict is not resolved, so can't talk of membership. Even in the Vilnius meeting, NATO did not even promise to start negotiations as soon as the war is over, They just said "Ukraine will become a member of NATO" which is just showing a carrot at the end of a long stick to keep the donkey moving. They have no intention to end the war. Just prolong it or freeze the conflict. Prolonging the conflict will give Putin to regain some strength, so they'll just use Ukraine to bleed Russia continuously but slowly.
There is no minimizing how self-servng and cowardly NATO is being at the cost of Ukrainian lives.