When we understand the prayers of Rosh Hashana, we gain a clearer picture of the themes of the day. The mussaf prayers centers around malchiyos, zichronos, and shofros, where we focus on Hashem ruling over the entire world. We want to bring the true value of Hashem back onto this earth, following in the path of Avraham Avinu. Our tefillos do not focus on personal needs; rather, we ask for life only for the sake of Hashem. On Rosh Hashana, we reconnect to the big picture of what the world was created for and do not focus on our own teshuva.