Flying legend and all-round gentleman Neville Duke, and his delightful wife Mary, used to fly in for lunch most Sundays:
That's all very well, but you probably already knew his aircraft type and his point of departure. And other aircraft could benefit from knowing the direction from which he's joining, even if it's not important to you. I agree with your sentiment, that unnecessary RT is to be avoided, but there is a balance to be struck.