Just a bit of history, why the concept of marriage even came into place...

1. Alliances - Army (Kings and Queens of different region)
2. Spreading Blood Lineage
3. Sense of security
4. Preserving cultures - when people of same region or set of belief get married

The "piece of paper" came in when the world had formal govt. kindda setup.

Now in modern world, when everyone is independent, the above reasons are no longer valid... there are no forts to be build, everything has be mixed up, no pure lineage to be maintained..

The DOORS are open - both for entering a relationship and also exiting the same - so the piece of paper issued by the government has no meaning...

If Marriage is mutual trust and friendship... it is always important...
If marriage is a piece of paper, better burn it...