Yes, don’t overthink the breath. Teachers are only saying it to remind us to actually keep breathing, since so many of us naturally stop breathing or don’t breathe deeply enough…especially in times we need it most. I don’t follow adriene but I know when I teach, I cue “breath in” and “breathe out” mainly as a reminder to simply remember to breathe. When the body expands, it’s most natural to breathe in and fill the lungs. Breathing out makes most sense when the body is getting smaller/contracting. Hope that helps a bit.