You're talking about colleagues, who you don't have any duty to be emotionally available for, but the parent poster is talking about friends and family.

The top comment even mentioned strangers!

Even if you have no contractual obligation to listen to your coworkers, in general many people enjoy, and potentially expect, to become closer with their coworkers which is generally accomplished through sharing personal details and emotions. It's totally fine if you don't want to participate, (and it's possible for people to over-rely on others for emotional labor) but I think many other people are more productive when they're more than just acquaintances with their coworkers.

You may not feel an emotion connection to people you've spend thousands of hours around but that is unusual. Most people do. You can't really expect people who spend 1/3 to 1/2 of their waking hours in close proximity to one another for years to not become friends and confidants who are able to talk about serious, non-work things together. It's normal.

I'm quite certain everyone else knows we're talking about personal lives, not colleagues.

Some colleagues you spend a lot of time with and and there is still a bond even if you are not real friends that would spend time together outside of work.

Sometimes my colleague needs to went about a project that is going bad or a person that is making their life difficult and sometimes I might do that as well. You listen and sometimes you discuss solutions but sometimes it just venting about a situation you both know is shitty.

Just don't become they guy/girl who is always negative or talking shit about people though.

The discussion started even mentioning strangers.