Yes, that's exactly what happens and what the page is about. People often type hi, and if they don't an answer right away, they get distracted with something else. Then I reply hi back, and the same happens again on my side. Maybe the delay is just the 30s each time, maybe is 2 mimutes. Sometimes this cycle repeats again because they ask how I'm doing! And each time I need to interrupt what I'm doing and state at the screen waiting. Instead of just quickly reading and immediately replying. There's literally no advantage to separate pleasantries in chat.

A lot of timid people want to see if the other person would even commit to a conversation. If you are the first one to start a conversation, and I see you do not fully commit with a half limp "hi" or "can you help" with no context or anything to tell me, then I will simply ignore it.