In Cars 3 when we first meet Cruz Sterling refers to her as their “Maestro of Motivation”. Then we see Cruz’s training revolves mostly on motivation as they race and prepare. She spends so much time making sure others are calm and confident so they can succeed at their dreams.
Then later on we got Cruz’s backstory. She couldn’t achieve her dream of being a racer because she wasn’t confident enough in herself. She gave it up because she couldn’t find the motivation to think optimistically and give it her all. Instead she gave up. She believed she couldn’t do it.
CRUZ PUTS SO MUCH EFFORT INTO MAKING SURE OTHERS ARE CONFIDENT BECAUSE SHE WAS NEVER CONFIDENT HERSELF.