If everybody followed this mindset though, people start to expect that you'll read their replies. I don't want to be always burdened with that. Reddit and chat messengers already come with that sort of culture. I sort of enjoy the Hacker News style of not receiving notifications, it creates a culture where you can just share comments and perspectives without tying yourself down to a conversation.
I think this promotes a different style of content than you could get on other platforms. For example, I'm more careful about packing all my ideas into a single concise take if I'm not planning on having a long drawn out thread where I continuously clarify my position.
If I'm really curious about replies to my comment, I'll check back. Otherwise I comment and move on with my life