Hierarchy in chat between sender & receiver [duplicate]

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Why is it that many chat applications, the chat messages you send yourself are often highlighted with color, whereas the messages of the person you are talking to are often grey & seemingly lower in hierarchy?

Isn't the message of the other person more important than your own message, as the content of this message is the reason why you're visiting the chat, not to read your own message again.

Is it because it makes it easier to make the difference between you vs. the rest in group-chat?

Examples:

  1. Whatsapp
  2. Facebook Messenger