What's the point of marriage?

Historically, it started out as a way to unite families for power reasons and to provide children.

Then it shifted to marriage being based on love and wanting to be one person for the rest of their life. "Till death do us part"

But with divorces on the rise, doesn't that defeat the point of marriage?

If you can marry someone and commit to love and care for them forever in sickness and in health till death do you part, but then get a divorce 2 years later, what's even the point to begin with?

Sure the tax breaks are nice, but marriage has lost a lot of its initial value.

It seems nowadays girls just want a ring to show off to their friends and a fancy wedding and afterwards complain, then want a divorce then take half your earnings (if you're dumb enough to not get a pre-nup).

So if two people aren't going to stay together forever and legally they can get divorced whenever they want and in most marriages people do get divorced, what's the point of marriage in the first place?

You don't need to get married to have kids, and you don't need to get married to have sex, so I don't see any advantage to it for men or women.