I did a quest in Imperial City.
She showed me a yellow reward but she gave me a purple one... LOL
It was my first daily quest.
I got it after doing something else, so no matter.
People choosing to play the game differently to you are not wrong, bad, stupid or playing too much, or too little. They are just playing it differently to you, they don't need you to "correct" them. No one is playing the game wrong unless they are cheating or hurting others.