Torque is a physical property. Physics is everywhere in everything you physically do, so yes, it still has to do with torque. Even if you don't move your hands at all (which you do when floating during touch typing: watch your hands while typing, you'll see). Your fingers and even your whole hand are a chain of interconnected pivots. Cap profile, which includes height and surface angle, and the angle at which you apply force, all matter. You'd have to draw hundreds of force diagrams for each scenario, but nonetheless, torque is more significant here than keycap weight, the difference in which is negligible in this case versus the force required to actuate (and bottom out). Your second paragraph does in fact imply that the geometry changes with each profile, thus your force diagrams will be slightly different from one profile to another. It doesn't change the physics concept behind it though.
