iPhone Express Transit Card

Ok, so basically…

Do I not even need to add a Breeze card to my Wallet in order to use the Express Transit Card?

If so… why would anyone pay the $2 Breeze Card fee?

Basically, I use MARTA about once a year. I’m planning to take it from Lenox to the airport next week (and make the same trip in reverse when I return home on the 18th).

I went into my iPhone settings and chose a payment method to use for the Express Transit Card. Is that literally all I need to do?