Arranged marriages are the most obvious example. Two families get together and decide <X> and <Y> will marry to advance familial interests; wishes and desires of <X> and <Y> be damned.
Divorces becoming normalized and destigmatized (to some degree) is also a modern phenomenon. Lest we forget, the Church of England came into existence for the sole reason that the English king at the time wanted to divorce his queen.
There's no reason to feel sad that marriage isn't about "love", because that notion is at best a recent turn of events, and at worst an elaborate lie woven by storytellers of various forms through the ages. Fact of the matter is that marriage for the vast portion of human history has never been about "love". Marriage has always been about money and power, and ultimately leaving offspring in a manner whose lineage can be easily traced back.