Marriage has for most of its history been an arrangement for securing alliances and ensuring transfer of generational wealth. Since the sexual revolution [1] the pendulum has swung completely back the other way and attitudes toward marriage have focused almost exclusively on romance. The problem since then is that hormonally-driven romantic attachment is fleeting and unreliable, so security of relationships has dropped dramatically.

If people want to have a long-lasting and successful marriage they need to be clear-eyed and pragmatic about it. The fact that Hollywood makes a fortune selling romantic stories has not helped!

[1] https://en.wikipedia.org/wiki/Sexual_revolution

Surely this is not the first time you've heard 'partner' to refer to someone in the other half of a committed relationship.

Honestly, the relationships are similar. They both require a lot of trust and companionship to be successful, you spend a lot of time with both people but in very different ways

Finding good business partners is like dating

That's a pretty creative translation of what I actually said.