This is a great comment and I completely agree with you!
Also, this process has led to the social interaction of the members on steemit has they are able to communicate and make friends via commenting.
Steemit is a social blogging network meaning engagement and networking is a good way to build relationships and your account.
I like that you also placed commenting as a major source of learning. We read, ingest knowdlege from other people.
Exactly @maverickinvictus