Shallow exposure to other experiences never told me much. People hold back out of fear of harassment in a place as public and algorithmically tuned toward creating negative experiences as Twitter. Mastodon and the fediverse improve on that slightly by not having the algorithm, but there's still harassment.

I certainly don't reveal my whole self on social media. I open up a bit more in places with good moderation like this, or places where I control the comments like my blog.