It's an essential leadership trait. Help others see more in themselves than they would otherwise. He mixes high standards and accountability with good communication (i.e. listen as much or more than you talk), trust, collaboration and appreciation.
I remember when he arrived in 2017 hoping he could take the offense from 14 PPG to 18-19. From 4 wins to 7-8. Felt that would be progress. Others in the building may have felt the same way. But it was myopic and small thinking and he was going to have none of it.
Those traits are not some sort of magic wand that everything falls into place from. But they are essential traits of real leaders.