Why do people care so much about getting married? I never really understood this. Why are you expected to get married eventually (especially before you have kids)? And why does your family often pressure/encourage you to get married in the future (even if you don't currently have a significant other)?

For example, my family keeps telling me that I'm going to get married someday, even though I told them that I don't really care about getting married/having a wedding, and I don't have a boyfriend or girlfriend currently. (I'm a bi woman.) I feel like it's just assumed that everyone is eventually going to get married, but why?

I understand that some people do it as a way to show love/commitment, but you could still just get divorced, anyway. Is it because getting divorced is presumably more difficult than just breaking up, so there is naturally more commitment involved (ostensibly)? But if so, couldn't this potentially also be a bad thing, as well (like if you have a messy divorce)? (My parents had a messy and drawn-out divorce, so I've seen it firsthand.)

I'm just trying to understand what the point is? What are the benefits vs. downsides?