That's actually one of the reasons I stopped attending Church. As I stood outside with my little ones I wondered what was the point. I spent all morning getting myself and the kids ready and then stood outside the chapel or in the meeting room waiting for it to be over.
What do you do for 3 hours every Sunday?
Hoo, boy, the stress of those days. Getting three babies ready alone (then-husband at early bishopric meeting), one throws up the minute I'm trying to leave. Turn around, go back, change baby, back to the car. Get there late, stand in the hall juggling a baby on one hip, refereeing the other two, feeling guilty for not being one of those perfect Mormon mothers who could get seven kids to sit still (we had one of those, and she also lost every pound of baby weight before leaving the hospital in jeans) Not to mention trying to struggle with mid-week meetings. I ended up in a therapist's office (nonLDS, the LDS therapist was no help at all). Felt guilty for THAT, too.
What did we do for three hours? It was divided into three meetings, with more time spend in sacrament, the "sermon" meeting. There, aside from having the sacrament (what protestant churches call communion), three members of the ward are pre-chosen to give talks on assigned subjects. It's usually dreadfully boring. Then you have Sunday School, in which teachers use the preset curriculum material to teach lessons about various scripture-centered topics, pulling in church history at times. Then the women go to Relief Society, the men go to Priesthood. Again, the teachers deliver prepackaged curriculum material about aspects important to either being a woman and mother, or father and priesthood holder.
These lessons cycle over a four year period (at least they did when I was a member). They make new lesson material, so it's not exactly the same, but basically the same topics are covered over and over and over and over and over. There's a lot of repetition in LDS meetings, but that is true to SOME extent in all religions. But since "correlation" (in which the central church exerts tight control over what is taught), I think that trend is heightened in LDS meetings. Leaders recognize this repetition, and tell members it is their responsibility to learn SOMETHING NEW in every meeting, no matter how many times they think they've heard it before. :P