The catechism I was exposed to about five decades ago did - everything is here so that we humans can "glorify God and praise Him."
Is that an unsatisfying answer, or what? I thought it sucked then, and I was a prepubescent missionary brat.
This former protestant was given the same boilerplate answers. After a while I just nodded my head and went through the motions. Looking back I wonder how many other members of that congregation were doing the same.
It just seems really weird that an all powerful, all knowing creator would produce a massive universe just so one day he could get pissed off watching a hairy little primate teen ager whacking off in a tiny little corner of the Universe. Billions of galaxies, each with billions of stars, each with planets of their own, and this supreme creator is worried about us eating pork? Sometimes it's a little hard to figure out.