Q1- Why do you think some people hesitate or don't react (like, comment) on other people's posts? (Are they shy, just busy, or naturally quiet 'silent readers'?) Well , I think these are silent readers and such people can be found on any social media even on Facebook. They have fear of visibility because by reactions, comments the author of the post will know who read my post and that's the thing which such users want to hide.
Q2- As a content creator or poster, how does it feel when no one interacts with something you put effort into? It demoralizing, heartbreaking and discouraging to any content creator when people just pass by without even a good smile ( which is free ) from his content for what he put his time , energy and effort.
Q3- In your opinion, how can we change this culture to make our interactions more lively, supportive, and fun for everyone? Well , world going more metallic then moral values and the race of chasing goals ( money on social media) is much faster than before which put everything in measurement of self benifits. I think it is not reversible but yes by incentives of reactions we can regain that glory again.