Many times I want to communicate to a king. The only way to do this is to friend him. This has two problems:
Accepting is a bit like a commitment. There is that struggle should I accept or not. Once accepted and the conversation is over I need to unfriend - which feels bad
You can only have a limited amount of friends.
If there is a chat request feature that last 24 hours them it will be possible to chat without making any commitments.