Judging by the divorce rate in the US where we date for a long time before marrying, it does not appear the length of time you spend with someone before deciding to exchange vows them is not a good predictor of success in marriage.
Actually I would say arrange marriages have a higher chance of success simply because people who know you well decide to give you in marriage to someone else whom they know kind of well.
What does hearts are "really knitted together" even mean ?
I agree about the proxy part, but for rational discourse we need to start somewhere.
Personally, I don't know what that is because I don't think I've had a high quality relationship or maybe I'm not even sure what that means.
Actually I would say arrange marriages have a higher chance of success simply because people who know you well decide to give you in marriage to someone else whom they know kind of well.