I think this may be part of it Tallg but this extends to any religion/culture that practises arranged marriages.

It can be that parents are looking out for their daughters futures, it could be due to family obligations and strenthening family ties, it could be that parents can be a bit more objective sometimes than a young lass who is smitten and see things in her suitor she may be blinded to.

Arranged marriage has been practised for so long I think the reasoning is limitless and perhaps each case individual. I am not sure arranged marriage is the biggest issue but rather forced marriage. Islamically a gal should approve even if her suitors are arranged but sadly this doesnt always happen in any culture/religion.

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"Diplomacy is the art of saying 'Nice doggie' until you can find a rock - Will Rogers"