I know you’re saying commenting on other posts is just as (if not more) important than replying to comments left on our own posts.

I think this depends on the persons post and what their posting nature is. If they are a blogger writing a blog and are here on Hive for the Blogging experience only, (to spread their message), then staying in and on their own blog is not a real problem, they are here for the business aspect, not the social aspect.