Truer words have not been spoken.
But it's sad, really. It is a little silly that
1) woman sometimes take it as the norm that they have to receive expensive jewellery before getting married to a guy. If an expensive diamond ring is seen as a requirement (which probably often is the case), a premium is put on the relationship. Rather unromantic if you ask me.
2) men take it as the norm that they absolutely need to fulfil the rather materialistic needs of their future fiancées.
Of course, all of this happens within the culture most of grew up in - there are many forces at play: social expectations, peer pressure, romantic ideals, and the power of the diamond industry's advertisement campaigns.
The above, of course, does not necessarily have bearing on a situation where a woman does not require/demand an expensive diamond ring, and the groom-to-be lovingly chooses to buy an expensive ring anyway as a token of his love. This is not what I'm talking about. Also, this does not necessarily have bearing on people who buy modest engagement rings, remaining within the boundaries of their financial means.
I'm just afraid many of us rather thoughtlessly take part in a ritual in which De Beers emerge as the ultimate victor.
Sorry for my rather pessimistic/bleak view on this.