Well here's the main thrust of it.
If someone is told that they are to marry no matter what, then all the pros and cons have to be listed, along with strategies, long term plans, and all the minor details.
And if marriage is done as a whim, none of the above is taken into consideration.
So based on logic, and planning "arranged" marriages will last longer.
Realistically though, arranged - planned - discussed marriages will always take place...it's the one-off spur of the moments no planning or long term forecasting one that will take place more often and without consideration.
So marriage stats will skew to show idiots getting married all the time.
So arranged marriages will solve this problem, but the majority will not do it as it takes to much work and effort.