On a lighter note - I saw a chat message that started with "Hey dude! How is it going". I'm disappointed that the response was not https://nohello.net/en/.
You just can't win.
Usually within a few minutes there's followup context sent. Either the other party was already in the process of writing the followup, or they realized there was nothing actionable to respond to and they elaborate.
A: Hello!
B's bot: Hello to you too! I am a chatty bot which loves responding to greetings. Is there a message I can forward to B?
The concept simply needs a more descriptive name to be accepted. It's not about not saying hello. It's about including the actual request in the first message, usually after the hello.
In German, if you ask this question, it is expected that your question is genuine and you can expect an answer (Although usually people don't use this opportunity to unload there emotional package, but it can happen!)
Whereas in Englisch you assume this is just a hello and nothing more.
Of course, both are generally rhetorical, which must be confusing for some foreigners learning English, especially with the correct response to "Alright?" being "Alright?" and similarly with "What's up?".
Though I have had the equivalent in tech support: "App doesn't work" which is basically just hello, obviously you're having an issue otherwise you wouldn't have contacted our support.