Yeah but I also see it as a social thing in the Fandom. Everyone overshares. It's how social interactions work. And if you don't have a stance you are called out for it. Popular people do it constantly shows it's not something unique to individuals, but how the Fandom communicates.
I think it might be a symptom of people who haven't had to develop a "professional" persona, separate from their personal. You have to draw a line between what you share with your inner circle of trusted friends and family, your burdens and opinions, and what you share with strangers.