Marriage of attraction is a gamble anyway so you might as well marry into a family that is similar to your own and make that much less of an adjustment. But the 'love marriage' as it is called is equally common in India now. But it would be interesting to do a comparison of what would work better. Marriage is hard work and it is a gamble.
The essential elements of giving are power and love - activity and affection - and the consciousness of the race testifies that in the high and appropriate exercise of these is a blessedness greater than any other.