

Yes, it’s very common. There are many reasons.
Sometimes I’m just excited to share something. Could be something trivial (“i saw a cat on the walk over and it looked right at me and said ‘meow’!”). Could be something bigger (“They finally fired Useless Bob at work”)
Sometimes people want to vent. Talking about something can be emotionally soothing.
Sometimes people want help or advice. “I can’t believe I’m spending $20 a day on lunch. The stupid sandwich I got wasn’t even good. What’s your strategy?”
Humans are social creatures.
I think most computer users now don’t know that file systems exist