To know someone for just 28 Sundays, to me, is not enough time to make a 50 year commitment with a marriage.
Seeing how 50% of marriages fail, I would certainly want to really get to know a person. I meet people all of the time and as time goes on, people end up letting their guard down and you get to know them better and better, in time. That is the advantage of time.
If people decide they want to spend the next 50 years together, then what is the rush to get married if you are going to commit your lives together anyway? If you truly are in love, then that love will last another year, right?
Those who rush into marriage, to me, do it with a touch of insecurities while the going is good and their partner does not know who they really are or they would not marry. So, rush to the alter they go. Mind you, not in all cases, but really, to marry someone after only dating for 210 DAYS in the promise to spend the next 18,250 days (fifty years) together. You do see how imbalanced this is, right?