The biggest problem for people is commitment. An example: Restaurants in London found out that their customers don't want a lot of choices. This gives them the feeling of missing out on something. And i think that people on dating sites behave similar. They don't commit to each other, thinking there could be someone better or who fits more. I just think love without commitment doesnt work. I think arranged marriage is a very old tradition, where a lot of clans or tribes fought against each other. The inidivuum was not so important and an arranged marriage would guarantee peace and strengthen families, tribes or even Kingdoms.