You’re right, it’s not needed – but it still adds a personal touch.
Your question reminds me of this exchange, found early in Tolkien’s book The Hobbit:
“Good Morning!" said Bilbo, and he meant it. The sun was shining, and the grass was very green. But Gandalf looked at him from under long bushy eyebrows that stuck out further than the brim of his shady hat.
"What do you mean?" he said. "Do you wish me a good morning, or mean that it is a good morning whether I want it or not; or that you feel good this morning; or that it is a morning to be good on?"
"All of them at once," said Bilbo.