It's a common Indian thing to type a greeting, then wait for a response before actually getting to the point. It drives a lot of people crazy, because now we have to respond back and prompt them to tell us what they need and wait for a response, which is frequently a while later, causing a lot of interruption to what might otherwise be productive working time.
It turns a "can you send me this info" 5 minute task into a multiple interruption pain in the ass
and if the conversation is already ongoing, just say that you are writing a wall of text, or write it all out without care, instant communication is a new thing but writing letters or quick mail inquiries are not. communication skills are so weird for some people.
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.