I think most people commenting here on India and arranged marriages have no clue what they are talking about. While some of it is generally true, but not any more truer than if I make a statement like &quot;Cops in the US are wife beaters&quot; (Translation: Long stressful job with association with violence seems to increase the likely hood of domestic violence compared to general population.) 
Arranged marriages may have started off as ways to solidify clan associations.. may be.. in the long lost past and more recently for a very select few. By and large arranged marriages in India now a days is just a matter of convenience. Mostly parents, bride, groom all reaching some sort of a consensus as to whether the marriage is likely to succeed. Why does this matter? Generally because unlike (again generalization) in the western society, this is truly two families coming together. It is easier for every one if there is a bit of compatibility between families too in addition to the bride and groom. 
As to the &quot;messed up&quot; factor in this, usually these marriages do not happen overnight. Engagement is followed by many months (to many years) of time &quot;together&quot; (not necessarily in a live in sort of way) after which the wedding happens. In many many cases the engagement gets broken off for one reason or another. There is a certain amount of taboo associated with this, so it is not easily said and done. On the other hand, this is good practice ground for resolving conflict among each other. 
Contrast this to ( what appears to me, an Indian) the usual dating ritual in the US.. Mostly starts of with both parties in various degrees of inebriation, followed by some awkward dates where one pretends to be smarter, funnier and what not, followed by a few sexual encounters, after which reality may dawn and the relationship is broken  off. Fast forward many years and relationships and at some point the people involved realize that well, no body is perfect, lets make this work, we have some similar interests and lets face it, we are getting old. They decide to make it work and get married.  
I do not generally see how this has any chance of working any better. If one could see the magic list of all the people (past present future) one could potentially get married to, with all the qualities listed, sure, one can pick the perfect partner. But till then, it is like predicting the best time to buy a stock. Who knows if something better is in the horizon. But more importantly should one care?