Try throwing a ball into the air while driving along in a car. Just after throwing it up have the driver turn sharply. What does the ball do, stay within the cars frame of reference, moving with the air mass? Now try doing the same with a sheet of paper, something with less inertia and more air resistance. Same result?
If you leave a loose article in the cockpit during turbulence does it stay fixed to the aircraft’s plane of reference, moving with the air mass in the cockpit? Why do we think that that an inertial/gravitational frame of reference works differently laterally to vertically?
I think you are all just arguing about the relative balance of inertial to aerodynamic forces. All sort of depends how much inertia you have and how much lift/drag you have.