Why do several different people who I just met feel the need to tell me their deepest, darkest shit?

So since I was 17, whenever I would meet new people and start a conversation they would tell me about their deepest/darkest shit rightaway.

Some examples:
17 year old me with my first job as a checkout girl at a supermarket. In the breakroom I ask a slightly older coworker what her hobbies are outisde of work. She tells me she fled to the other side of the country, becauae her parents stole all her money and that she now has no time for hobbies. I did not even know her name yet.

When I met some friends of my ex boy friend a few years ago at a house party, I introduced myself to each of them and went by to each of them to get to know them a bit later. They all told me different stories about their very disturbing nightmares, suicidal tendicies, eating disorders and overall depression. I never met any of those people and my ex boyfriend also did not know any of his friends struggled so much.

I get along really well with one of my current coworkers. We both love the same stupud TV competition (the masked singer), so I invited her to come watch it at my house. During the first commercial break, I wanted to get some snacks and she decides to tell me how she lost her virginity: by being raped by the boyfriend of her best friend. She went in great detail about how he pulled her of the bed, put her on the floor and how he held her etc. She got so graphic, I was baffeled and wanted to kick her out but felt mostly bad for her. I never invited her again to my house, since I felt extremly unconfortable.

There are many more similar situations with lots of different people, but this is the gist. It always comes straight out of the blue to me. I also try to express in a polite way that I do not feel comfortable talking about such heavy subjects, but some people just keep going. I never talk about my heavy shit at all with strangers like that, so I am very confused why so many basicly strangers feel the need to vent like that to me.
Why do several different people who I just met feel the need to tell me their deepest, darkest shit?
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