It could just be because people compare it to other social media platforms - this place isn't 'busy enough' or 'convenient enough' - on mainstream social media, there is A LOT more content, and it's really easy to find links to interesting apps and threads that just work.
I don't think we have any of that on Hive - if this is the case it's a catch 22.
Personally I think Discord is our biggest asset - take the eXode game - there's a lot of chat in Discord, which encourages people to post, I think we can say the same about a lot of communities.
Just a theory - it's not a 'live' platform is it - also on Twitter and Facebook, I can easily find people I know. Be they friends, colleagues, celebrities - there's none of that here.