Why do white people over celebrate weddings?

In America anyway. I mean there's the promise ring--engagement ring--wedding band, bachelor and bachelorette parties, engagement announcements, pictures and parties, rehearsal dinners, ceremony, reception, honeymoon, etc. What else? I know I'm probably missing some. Given the rate of divorce, why not just make it simple? Why all this over-celebration? Where I come from we just do it. I mean, get married and stay married for better or for worse, literally. There are no long azz engagements and over celebrating until you're broke and then can't even afford a place to move into after you say "I do." Might as well add in a divorce ring to it once you get divorced.