Wa`alaykummussalaam wa rahmatullaahi barakaatuh,
I hope you are doing well, Sister Maria.
All the commandments that Allaah made upon His Creations, know that it is for *our own* benefits and goodness, not for Allaah. Know that even if the whole world doesn't pray to Allaah, it doesn't decrease in His Bounty and His Richness. Allaah is Al-Ghani.
We pray 5x a day as to purify our souls and to shift our focus back to our main goal in this life: to seek the blessings and pleasure from Allaah subhanahu wa Ta`ala. Time by time, day by day, when we are so preoccupied with the people and this life, sometimes we forget to say our gratitude to Allaah. We forget to make our supplications to Him, seek strengths and forgiveness from Our Lord. Hence praying 5x a day is the least a believer should do.
It goes the same for all the pillars in our faith. Fasting during Ramadhan, paying our zakah, performing our pilgrimage. It's for our own goodness apart from it serves as our duty to the ummah as a whole.