Two thoughts after Rosh Hashanah prayers

1) Why do we do the abrogation of vows every year? Doesn’t the recitation of the abrogation say something like this: “And all the vows that I will make from now on are already canceled from this day on, etc., etc.” So we are already canceling in Hada Mecha all the vows that we make and have made? I ask from the perspective of prayer, is there any significance in doing the abrogation every year, and from the perspective of halakhah/scholarship, is canceling vows from now on beneficial?
 
2) In our father, our king, Shlomo, “We wrote in the Book of Life” or “…prosperity,” etc. are wishes and blessings with a gentle touch, but it is difficult to “We wrote in the Book of the Righteous,” righteous, upright, innocent, etc. are a matter of definition. Are I righteous or not? Then even God, blessed be He, cannot put me in the Book of the Righteous if I am not righteous??!