Now, i have thought about this statement for a while...
and i am pretty sure you are correct.

Marriage is the new boyfriend/girlfriend.

It used to be i like you so much lets go steady.
Now its i "love" you so much lets get married.

When marriage should only be engaged in when having children... strike that, it is better to stay unwed, because she will get free hospital birth, and a million other benefits you could not have if you tied the knot.

I remember a time when mother / father would sleep in separate bedrooms, but they would stay together, civilly, and raise their children.

Today, the reason for divorce are the same you would expect from people who were dating in school a half century ago.