I'd say it's because people are much more honest and open here than on other social media where people tend to be very performative and sometimes cruel without any real reason.
I also think that it’s because spacehey filters out the people who are overly performative because they find this app too boring to actually stay and explore.
Here they have to explore and find what interests them rather than the algorithm just feeding them what they want to see.
In my personal experience I rarely post on other social media or share my opinions but here I feel safe to share all of that and I feel like I’m part of an actual community that I can contribute to rather than just observe from the sidelines.