Equanimity and mindfulness go hand in hand. The person who is totally aware of his environment but unable to view it with detachment may go insane. But equanimity without mindfulness may be no more than avoidance and denial.
By practicing both mindfulness and equanimity, you are able to face your fears and demonstrate that they have no power over you. You can experience chaotic conditions and view the panicked reactions of others without being infected by that virus yourself, enabling you to deal calmly and successfully with the situation. You can enter into unfamiliar surroundings in full confidence that you will be able to handle anything you encounter. You can refuse to take on other people's problems as if they were your own, and compassionately allow solutions to emerge naturally. You can distinguish between situations requiring action and those that are purely ego-generated distractions. Anxiety fades as you rest in the awareness that you and all beings are perfect and invulnerable children of God. Your "comfort zone" expands to fill your entire Universe.
Namaste