That presupposes that marriage is solely about love, which is itself an odd and mostly western concept.

Marriage is, just as much, an economic arrangement in which people make often very significant sacrifices in order to create a household and potentially raise and support children. It necessarily entails a significant commitment on both sides, including the commitment to stick with each other in the case of hardship or sickness. When you account for that aspect of marriage, it makes total sense to require some showing of financial wherewithal.