Because the others are not all that.
If you disappoint yourself, you change it and un-disappoint yourself. If someone else disappoints you, well, it’s… disappointing.
So, be yourself. And every once in a while, if you’re unsure how to carry on or you feel somehow hopeless, take inspiration from the fictional ones. Be Xena Warrior Princess. Be Tony Stark. Be Hercule Poirot. Be Brienne of Tarth. Be someone amazing.
I’m not saying that holding up two autumn leaves and taking a picture of them with your smartphone is being a hero but hey, it’s a start. #IHeartMe