Even if it was affordable why would you want the trouble?
Divorce forces you to effectively hate the person you loved, and likely still love and care deeply about even if you are separating.
Long term breakups aren't easy, adding a financial and legal mess into them isn't something anyone would be looking forward too.
http://www.nytimes.com/2005/04/19/health/divorce-rate-its-no...
and mhurron beat me to the punch...
No they're not. http://www.nytimes.com/2014/12/02/upshot/the-divorce-surge-i...
And where are you getting the idea that a diverse occurs between people that care about each other? If they still did, the divorce wouldn't be happening.
Myself and pretty much everyone I know if asked what is the average divorce rate would say it's around 50%, many of us also have the pleasure of having close friends who married really early (early 20's) going through a divorce right about now (in their late 20's to early 30's) which solidifies this perception even further.
In this case like in many others the perception is what matters, even if in reality it's quite different, I wonder why this hasn't been addressed more frequently since in the early and mid 90's the trope of the 50% was broadcasted all the time.