You said that it happens in Asia. You said that it isn't forced. You said that the marriage can be called off. I'm saying that is not true. At least in my experience it is not.
That's been my experience as well (albeit 2nd hand knowledge ie talking with people who are in arranged marriages)
Leo Mary
You're first post made it sound like you were saying that you're understanding of arranged marriages was that the two people getting married "arranged the marriage, for themselves" - is this what you meant, because if so you've misunderstood.
Many times two families will arrange the marriage of their children to each other - specifically for financial gain, property or to secure the social status of the families... it's "nice" if the to people getting married like each other, but honestly it's a family business transaction.
Many times the two people getting married don't really have a choice in the matter. They aren't physically "forced" into the marriage, however they are heavily pressured by their families who will tell them from the day they are born that they "will marry ______ for the benefit of the family" and that "it is their responsibility as a son/daughter of the family to marry ______" - even "If you do not marry _______ we will disown you, it will be as if you are dead to us".
Sometimes the people being married to each other like/get along with each other ... sometimes they don't. Sometimes they are allowed to say "no, I don't want to marry this person", but often that is not the case.
Also - I'm not really sure where you learned that it was most common in Asia, because for centuries it was common in almost every country in the world.
The idea of marrying someone "for love" is actually a fairly new concept ... up until the last hundred years or so most people married for social status, and to "better" both families wealth and land. Actually if you read classic literature, you'll gain a better understanding of how marriages worked for many many centuries.
One of the advantages of arranged marriages in which the families match up a man and women based on a number of factors that indicate they are well suited for each other long-term is that the man and the women enter into that relationship knowing that they will have to create and build a friendship and then hopefully a romantic attachment to the other person - they aren't deluded into thinking that somehow "love will make the relationship work" ... instead they know that it will require ongoing time and effort to make their relationship work short-term and long-term.
"Love based" marriages do most of the work at the beginning - learning likes and dislikes etc and "wooing" the other person while there's a lot of emotions (and lust) feeding the relationship. They think most of the work in the relationship is getting to the point where they get married and then they can relax because the hard "relationship work" is finished ... which is actually not the case at all (marriage is the
beginning of the work on the marriage relationship - and the two people need to work on that relationship constantly the entire time they're married)