People tend to make conversations in real life but I'm wonder why they say "good bye" so soon in comments. Ha ha.. But you are correct, conversation is the sign of engagement. May be their busy life style force them to quickly skip from a conversation.

The quality vs value.. It is my personal opinion, the value is a part of quality. But in other hand, there can be a person who can gives a good knowledge but unable to organize his content. There is value but low quality. There are two kinds of people I see in steemit. :) You can guess.. As in normal life people with similar characteristics cluster together and they grow together. :)